1.2 Coordonnées des personnes-ressources et des institutions impliquées dans l'évaluation et la documentation de la Technologie

1.3 Conditions relatives à l'utilisation par WOCAT des données documentées

Quand les données ont-elles été compilées (sur le terrain)?

22/02/2013

Le compilateur et la(les) personne(s) ressource(s) acceptent les conditions relatives à l'utilisation par WOCAT des données documentées:

Oui

2.1 Courte description de la Technologie

Définition de la Technologie:

Belts of shrub or grass, planted on the level bund which constructed along contour line in gentle slope farmland in the black soil region of Northeast China.

2.2 Description détaillée de la Technologie

Description:

Shrubbery buffer strip with bund(SBSWB) is a traditional technology, it is introduced by the field staff about 60 years ago who worked in the farm in Heilongjiang province.This technology with low-cost, high effectives and easy to construct, which has been widely applied in all black soil region of Northeast China (Heilongjiang,Jilin,Liaoning,North of Inner Mongolia Autonomous Region).

Purpose of the Technology: The final purpose of these buffer strips is increasing crop production by decreasing soil loss. More specific objectives include: 1)protect the land from surface erosion by cutting slope length, increase infiltration and soil moisture; 2)to prevent soil loss of gentle slope farmland by allowing excess runoff to filter through but trapping sediment; 3) through the effect of tillage and water erosion between the strips, level bund lead to the formation of forward slope terraces over time, then developing into terrace final;4) creation of opportunities for additional income by harvesting fodder(grass) production and fruits(shrub).

Establishment / maintenance activities and inputs: A construction is generally carried out in autumn of the year; plantation is made in spring of the next year. The construction in a man-machine integration mode is generally carried out step by step and from top to bottom along the contour line(s). The ladder-shaped cross section of a ridge is 0.3-0.5m in width (suitable width on the top), 0.5-0.6m in height, 1:1 or 1:0.5 in inner-side gradient and 1:0.5 in outer-side gradient.
In a construction, peel the surface soil with machine, with the peeling depth generally being 0.3m, which should be subject to soil layer depth; then haul the ridge construction plough (a kind of machine or device) with a tractor to build the ridges, consolidate the ridges through artificial slapping; Finally restore the surface soil to accomplish ridge construction. The tops of the constructed ridges should be maintained to be in a horizontal surface. The distance between two ridges in this region is generally stipulated to be 50 meters. The soil for ridge construction should be free from such sundries as gravels, tree roots and turfs.

Natural / human environment: Shrubbery buffer strip is found mainly in Northeast China, at altitudes between 700 and 1600 m. Climate there is cold in winters and cool in summers, with a monsoon moisture regime. In the area, the annual mean temperatures is from 2 to 8 °C, and the annual mean precipitation is from 500 to 1000 mm. Most of the farmland slopes are less than 7°but slope lengths mainly range from 200 to 1000m in this area.
Northeast China, the grain production base of China, or the bread basket of China, includes three provinces (Hei-long-jiang, Ji-lin, and Liao-ning) and the eastern part of the Inner Mongolian autonomous region. In 2009, 17.1% the China’s total grain production came from this region, which included 33.5%, 55.7% and 9.6% of corn, soybean, and rice, respectively. Approximately 118 million people live in this region. Grain produced per capita is over 1000 kg annually.

2.3 Photos de la Technologie

2.5 Pays/ région/ lieux où la Technologie a été appliquée et qui sont couverts par cette évaluation

2.6 Date de mise en œuvre de la Technologie

Si l'année précise est inconnue, indiquez la date approximative: :

• il y a plus de 50 ans (technologie traditionnelle)

2.7 Introduction de la Technologie

Spécifiez comment la Technologie a été introduite: :

• dans le cadre d'un système traditionnel (> 50 ans)

Commentaires (type de projet, etc.) :

SBSWB appear in the vicinity of Heilongjiang province in the last century 60's

3.2 Type(s) actuel(s) d'utilisation des terres, là où la Technologie est appliquée

Commentaires:

Major land use problems (compiler’s opinion): Beacuse of long slope, high rainfall intensity, freezing and thawing processes, and intensive cultivation has lead to substantial water runoff, soil erosion, and gully formation. Soil erosion has been the serious problem threatening agriculture sustainability in the region for decades.The flora of the area are very diverse.

Major land use problems (land users’ perception): Soil fertility and crop yeild are decreasing year by year.

3.3 Informations complémentaires sur l'utilisation des terres

Approvisionnement en eau des terres sur lesquelles est appliquée la Technologie:

• pluvial

Commentaires:

Water supply also mixed rainfed - irrigated

Nombre de période de croissance par an: :

• 1

Précisez:

Longest growing period in days: 150Longest growing period from month to month: April to August

3.4 Groupe de GDT auquel appartient la Technologie

• mesures en travers de la pente

3.5 Diffusion de la Technologie

Spécifiez la diffusion de la Technologie:

• répartie uniformément sur une zone

Si la Technologie est uniformément répartie sur une zone, indiquez la superficie couverte approximative:

• > 10 000 km2

Commentaires:

This technique has been common applied in gentle slope farmland of the black soil region of Northeast China. It is very useful for reduce soil loss and intercept runoff.

3.6 Mesures de GDT constituant la Technologie

Commentaires:

Main measures: vegetative measures, structural measures

Type of vegetative measures: aligned: -contour

3.7 Principaux types de dégradation des terres traités par la Technologie

Commentaires:

Main type of degradation addressed: Wt: loss of topsoil / surface erosion

Secondary types of degradation addressed: Wo: offsite degradation effects, Et: loss of topsoil

Main causes of degradation: soil management (The extensive cultivation and management modes reduce the thickness of black soil layer by 0.5 cm per year.), population pressure (Great population pressure makes the land carrying capacity decline year by year.), education, access to knowledge and support services (The channels for the local peasants with low levels of education to learn knowledge are few, and they will not take initiative to learn knowledge.)

Secondary causes of degradation: over-exploitation of vegetation for domestic use (This area is the most important grain production area in China, there is serious excessive exploitation in this area.), change of seasonal rainfall (The rainy seasons mainly focus on July and August.), Heavy / extreme rainfall (intensity/amounts) (The downpours in summer bring about soil loss.), land tenure (As the lands are owned by country or by peasant communities, the peasants are not strongly aware of the importance of land protection.), poverty / wealth (The serious gap between rich and poor)

3.8 Prévention, réduction de la dégradation ou réhabilitation des terres dégradées

Spécifiez l'objectif de la Technologie au regard de la dégradation des terres:

• prévenir la dégradation des terres
• réduire la dégradation des terres

Commentaires:

Main goals: mitigation / reduction of land degradation

Secondary goals: prevention of land degradation

4.1 Dessin technique de la Technologie

4.2 Spécification/ explications techniques du dessin technique

The upper-base width, lower base width, height, slope ratio and spacing of a ridge are 0.5m, 1m, 0.5m, 1:0.5 and 40-60m respectively. A row spacing of the shrubs planted on the ridges should be 0.5m. Generally one row on each ridge is enough. About 80 shrubs are needed for every hectare; if herbaceous plants are planted, no special plantations are required.

Location: Chao Yang City. Liao Ning Province

Date: Nov 12,2012

Technical knowledge required for field staff / advisors: moderate (Field staff/agricultural advisor should have intermediate know-how level, because land user should be instructed by them)

Technical knowledge required for land users: low (The knowledge level of lander user is not required to be high, who just need(s) to follow the instructions from field staff/agricultural advisor)

Main technical functions: control of dispersed runoff: retain / trap, control of dispersed runoff: impede / retard, reduction of slope length, improvement of water quality, buffering / filtering water, sediment retention / trapping, sediment harvesting

Secondary technical functions: control of concentrated runoff: retain / trap, control of concentrated runoff: impede / retard, improvement of ground cover, improvement of topsoil structure (compaction), increase in organic matter, increase in nutrient availability (supply, recycling,…), increase of infiltration, increase / maintain water stored in soil, water harvesting / increase water supply, water spreading, increase of biomass (quantity), promotion of vegetation species and varieties (quality, eg palatable fodder), spatial arrangement and diversification of land use

Aligned: -contour
Vegetative material: F : fruit trees / shrubs
Number of plants per (ha): 200-600
Vertical interval between rows / strips / blocks (m): 5.644-8.466
Spacing between rows / strips / blocks (m): 40-60
Vertical interval within rows / strips / blocks (m): 0.5
Width within rows / strips / blocks (m): 0.5

Fruit trees / shrubs species: caragana, lespedeza, amorpha, daylily, Melilotus

Slope (which determines the spacing indicated above): 5-8%

Gradient along the rows / strips: 0%

Wall/ barrier
Vertical interval between structures (m): 2.09-5.55
Spacing between structures (m): 40-60
Height of bunds/banks/others (m): 0.3-0.5
Width of bunds/banks/others (m): 0.5-1
Length of bunds/banks/others (m): >100

Construction material (earth): The soil should be free from such sundries as gravels, tree roots and turfs.

Slope (which determines the spacing indicated above): 5-8%

Lateral gradient along the structure: 0%

4.3 Informations générales sur le calcul des intrants et des coûts

autre/ monnaie nationale (précisez):

RMB

Indiquer le taux de change du dollars en monnaie locale (si pertinent): 1 USD= :

6,25

4.4 Activités de mise en place/ d'établissement

	Activité	Type de mesures	Calendrier
1.	Plant shrubbery	Végétale	autumn
2.	Layout of contour and the line of SBSWB with the leveling	Structurel	autumn
3.	Build the ridge	Structurel	autumn

4.5 Coûts et intrants nécessaires à la mise en place

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% des coût supporté par les exploitants des terres
Main d'œuvre	Layout of contour	Person/day	3,0	16,0	48,0
Main d'œuvre	Build ridge	Person/day	36,0	9,6	345,6
Equipements	Machine use	hours/day	1,0	80,0	80,0
Equipements	tools	day	1,0	8,0	8,0
Matériel végétal	Seedling Plant shrubbery	ha	600,0	0,016	9,6
Coût total de mise en place de la Technologie					491,2

Commentaires:

Duration of establishment phase: 1 month(s)

4.6 Activités d'entretien/ récurrentes

	Activité	Type de mesures	Calendrier/ fréquence
1.	The farmers will actively protect the Bund in their land. Don't need money.	Végétale	autumn
2.	The farmers will actively protect the Bund in their land. Don't need money.	Structurel	autumn

4.7 Coûts et intrants nécessaires aux activités d'entretien/ récurrentes (par an)

Commentaires:

Machinery/ tools: Spade, Spade

3 people are required to layout contour, daily labor cost for per person is 100 Yuan, so the total labor cost is 300Yuan ($48), tools fee is 50Yuan ($8).
One tractor can built 2.6 ha of ridges per day at a cost of 500 Yuan ($80). The ridges constructed should be artificially tamped, 120 people are needed to tamp the ridges in an area of 2.6ha, about 46 people for each hectare. As the daily labor cost for per person is 60 Yuan, the total expense on each hectare is 2760 Yuan($441.6), and the labor intensity is intermediate.
If shrubs are planted on the ridges, 400 shrubs are required for each 1 hectare management area. In addition, as the price of caragana microphylla in 2012 is 0.1 Yuan per one, the total cost of the caragana microphyllas per hectare should be 40Yuan($6.4).
Therefore, the total construction cost per hectare is 3650Yuan($584).

4.8 Facteurs les plus importants affectant les coûts

Décrivez les facteurs les plus importants affectant les coûts :

The most determinate fators affecting the cost is labour

5.1 Climat

5.2 Topographie

5.3 Sols

Si disponible, joignez une description complète du sol ou précisez les informations disponibles, par ex., type de sol, pH/ acidité du sol, capacité d'échange cationique, azote, salinité, etc.

Soil fertility: high

Soil drainage / infiltration: good

Soil water storage capacity: low - medium

5.4 Disponibilité et qualité de l'eau

5.5 Biodiversité

5.6 Caractéristiques des exploitants des terres appliquant la Technologie

Indiquez toute autre caractéristique pertinente des exploitants des terres:

Land users applying the Technology are mainly common / average land users

Population density: 50-100 persons/km2

Annual population growth: < 0.5%

5% of the land users are very rich.
45% of the land users are rich.
35% of the land users are average wealthy.
15% of the land users are poor.
5% of the land users are poor.

5.7 Superficie moyenne des terres détenues ou louées par les exploitants appliquant la Technologie

5.8 Propriété foncière, droits d’utilisation des terres et de l'eau

Propriété foncière:

• communauté/ village

Droits d’utilisation des terres:

• individuel

Droits d’utilisation de l’eau:

• communautaire (organisé)

5.9 Accès aux services et aux infrastructures

6.1 Impacts sur site que la Technologie a montrés

Impacts socio-économiques

Production

Disponibilité et qualité de l'eau

Revenus et coûts

Impacts socioculturels

Impacts écologiques

Cycle de l'eau/ ruissellement

Sols

Biodiversité: végétale, animale

Réduction des risques de catastrophe et des risques climatiques

6.2 Impacts hors site que la Technologie a montrés

6.3 Exposition et sensibilité de la Technologie aux changements progressifs et aux évènements extrêmes/catastrophes liés au climat (telles que perçues par les exploitants des terres)

Changements climatiques progressifs

Changements climatiques progressifs

	Saison	Type de changements/ extrêmes climatiques	Comment la Technologie fait-elle face à cela?
températures annuelles		augmente	bien

Extrêmes climatiques (catastrophes)

Catastrophes météorologiques

	Comment la Technologie fait-elle face à cela?
pluie torrentielle locale	bien
tempête de vent locale	bien

Catastrophes climatiques

	Comment la Technologie fait-elle face à cela?
sécheresse	bien

Catastrophes hydrologiques

	Comment la Technologie fait-elle face à cela?
inondation générale (rivière)	bien

Autres conséquences liées au climat

Autres conséquences liées au climat

	Comment la Technologie fait-elle face à cela?
réduction de la période de croissance	bien

6.4 Analyse coûts-bénéfices

Quels sont les bénéfices comparativement aux coûts de mise en place (du point de vue des exploitants des terres)?

Quels sont les bénéfices comparativement aux coûts d'entretien récurrents (du point de vue des exploitants des terres)?

Commentaires:

Although Certain quantity of land will be occupied and grain output will be affected in SBSWS during the early period of a construction, in the long run, SBSWS can prevent the loss of the most fertile surface soil, in addition, with the ever increased quantity of the sediment intercepted by SBSWS and as the heights of the vegetational belts increase year by year, the slope croplands will become bench terraces, and the grain output will be increased.

6.5 Adoption de la Technologie

Si disponible, quantifiez (nombre de ménages et/ou superficie couverte):

NA

Commentaires:

80% of land user families have adopted the Technology with external material support

Comments on acceptance with external material support: Large-area popularization of SBSWB has been achieved in the locality.

20% of land user families have adopted the Technology without any external material support

Comments on spontaneous adoption: The implementation of this measure was accomplished under the encouragement and support of the government. There are relatively few peasant households who initially take this measure. The main reason for the peasant reluctance to adopt this measure is that the ridges will occupy land and reduce arable area. They are unconscious of and do not care about soil loss, and unable to realize in the long run the harm brought about by soil loss.

There is a little trend towards spontaneous adoption of the Technology

Comments on adoption trend: The trend depands on government support

6.7 Points forts/ avantages/ possibilités de la Technologie

Points forts/ avantages/ possibilités du point de vue de l'exploitant des terres
Convenient for construction How can they be sustained / enhanced? Popularization carried on

Points forts/ avantages/ possibilités du point de vue du compilateur ou d'une autre personne ressource clé
Gradual formation of the slope-type terraces, which can be developed into bench terraces many years later How can they be sustained / enhanced? Increase of ridge height year by year
Intercepting the sediments carried by runoffs, preventing water and soil loss of the arable lands on the gentle slopes How can they be sustained / enhanced? In combination with other water and soil conservation measures during operation, such as no-tillage and drainage ditches;
increase of infiltration How can they be sustained / enhanced? Chopping down branches at regular intervals to guarantee that the plants on the ridges will not enter into rivary with the crops over water and sunlight;

6.8 Faiblesses/ inconvénients/ risques de la Technologie et moyens de les surmonter

Faiblesses/ inconvénients/ risques du point de vue de l’exploitant des terres	Comment peuvent-ils être surmontés?
The ridges occupy land and reduce arable area	government support

Faiblesses/ inconvénients/ risques du point de vue du compilateur ou d'une autre personne ressource clé	Comment peuvent-ils être surmontés?
Reduction of arable lands brings about low enthusiasm of the peasants	Conflict between the arable lands and the immediate interests of the peasants. Popularization of water and soil preservation knowledge should be strangthened to make the presants realize that although the immediate interests will be hurt, the long-term interests will increase.

7.2 Références des publications disponibles

Titre, auteur, année, ISBN:

Title:Techniques standard for comprehensive control of soil erosion in the black soil region Author:Shen bo; Meng lingqinYears:2009

Disponible à partir d'où? Coût?

internal materials