1.2 Detalhes do contato das pessoas capacitadas e instituições envolvidas na avaliação e documentação da tecnologia

Nome da(s) instituição(ões) que facilitou(ram) a documentação/ avaliação da Tecnologia (se relevante)

Northwest A&F University (NWAFU) - China

1.3 Condições em relação ao uso da informação documentada através de WOCAT

Quando os dados foram compilados (no campo)?

14/06/2011

O compilador e a(s) pessoa(s) capacitada(s) aceitam as condições relativas ao uso de dados documentados através do WOCAT:

Sim

2.1 Descrição curta da tecnologia

Definição da tecnologia:

Bench terraces are progressively expanded to form a fully developed terrace system in order to reduce runoff and soil erosion on medium- to high- angled loess slopes.

2.2 Descrição detalhada da tecnologia

Descrição:

n Miaowan Village, the technology is mainly applied to apple tree plantations. Tree seedlings are planted in rows every 4 m along the contour with a spacing of 2.5-3.5 m between rows. Trees are planted in pits 40 cm diameter and 3040 cm deep. Manure and/or fertilizer are applied and the seedlings are watered.

Around each tree, soil from the upper parts of the slope is removed and deposited below in order to extend the flat terrain. Over 5-10 years, the terraces become enlarged around each tree and form a terrace with the neighbouring trees along the contour, such that the slopes are transformed into level bench terraces. The fruit trees are located in the middle of the terrace. All the work is done manually using shovels.

Purpose of the Technology: The main purpose of this technology is to reduce runoff and soil erosion on the slope and to improve soil quality and soil moisture retention. It is a sustainable land use technology for small farmers because farmers can use their spare time to improve the land’s condition during the growth of the trees.

A major aim is to conserve water and reduce runoff. Soil erosion in this village is very severe and the soil erosion rate before amounted to 60-100 tonnes per hectare per year and was reduced practically to zero as a result of building the terraces. Slope gradients are very steep (around 20-35 degrees). The main income of local farmers is from orchards.

Establishment / maintenance activities and inputs: The establishment phase thus takes 5-10 years. Afterwards maintenance inputs are restricted to repairing the terrace walls.

2.3 Fotos da tecnologia

2.5 País/região/locais onde a tecnologia foi aplicada e que estão cobertos nesta avaliação

2.6 Data da implementação

Caso o ano exato seja desconhecido, indique a data aproximada:

• 10-50 anos atrás

2.7 Introdução da tecnologia

Especifique como a tecnologia foi introduzida:

• atráves de inovação dos usuários da terra

Comentários (tipos de projeto, etc.):

It is a kind of traditional method.

3.1 Principal/principais finalidade(s) da tecnologia

• Reduz, previne, recupera a degradação do solo

3.2 Tipo(s) atualizado(s) de uso da terra onde a tecnologia foi aplicada

Comentários:

Major land use problems (compiler’s opinion): On moderate- to high-angled slopes, water loss and soil erosion are very high. Outside the protected canopy of the trees rainsplash impact during heavy storms is very severe. The local farmers clear all the wild grasses and shrubs, such as Korshinsk Peashrub, Artemisia scoparia, Leymus secalinus, Stipa bungeana, Lespedeza davurica etc. to reduce competition with the fruit trees. Consequently, the soil is bare and unprotected

3.3 Mais informações sobre o uso da terra

Abastecimento de água para a terra na qual a tecnologia é aplicada:

• Precipitação natural

Especifique:

Longest growing period in days: 300Longest growing period from month to month: Mar - NovSecond longest growing period in days: 200Second longest growing period from month to month: Apr - Oct

3.4 Grupo de GST ao qual pertence a tecnologia

• Medidas de curva de nível

3.5 Difusão da tecnologia

Comentários:

Total area covered by the SLM Technology is 2.55 m2.

The whole area of this watershed is about 7.5 Km^2. There are a lot of orchard, mostly apple, in this watershed. It is one of typical watershed with specially soil erosion problem despite the high plant coverage.

3.6 Medidas de GST contendo a tecnologia

Comentários:

Main measures: structural measures

3.7 Principais tipos de degradação da terra abordados pela tecnologia

Comentários:

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

Secondary types of degradation addressed: Ha: aridification

Main causes of degradation: Heavy / extreme rainfall (intensity/amounts) (Storm are strong in summer.), other natural causes (avalanches, volcanic eruptions, mud flows, highly susceptible natural resources, extreme topography, etc.) specify (orchards on steep slopes without conservation measures), poverty / wealth (to increase the yield and income of orchard.)

Secondary causes of degradation: deforestation / removal of natural vegetation (incl. forest fires) (There is no natural grass cover here.), droughts (Lack of water for the cash trees)

3.8 Redução, prevenção ou recuperação da degradação do solo

Especifique o objetivo da tecnologia em relação a degradação da terra:

• Prevenir degradação do solo
• Reduzir a degradação do solo

Comentários:

Main goals: prevention of land degradation

Secondary goals: mitigation / reduction of land degradation

4.1 Desenho técnico da tecnologia

4.2 Especificações técnicas/ explicações do desenho técnico

i: first year: planting of fruit trees along the contour in small pits
ii: after 3-4 years: a small terrace is built up around each tree (as the tree grows it needs more water, which is collected from the platform around the trees..
iii: after 5-8 years: terraces develop
iv: final stage: fully developed level bench terraces

Owing to the soil properties of loess, there is no need to separate surface and subsoil as there is little difference between them. Therefore, soil can be moved directly from upper to lower parts of the terrace without changing soil fertility.

Location: Miaowan Village, Xuejiagou Watershed. Ansai County, Shaanxi Province, China

Date: 2008-12-20

Technical knowledge required for land users: moderate (It is easy to understand and implement.)

Main technical functions: control of concentrated runoff: retain / trap, reduced soil loss

Secondary technical functions: reduction of slope angle, increase of infiltration

Reshaping surface
Vertical interval between structures (m): 1
Spacing between structures (m): 2.5
Depth of ditches/pits/dams (m): 1..5
Width of ditches/pits/dams (m): 2.5
Length of ditches/pits/dams (m): 100-150

Construction material (earth): Using the earth of the same land.

Slope (which determines the spacing indicated above): 45%

If the original slope has changed as a result of the Technology, the slope today is: 2%

Lateral gradient along the structure: 2%

4.3 Informação geral em relação ao cálculo de entradas e custos

Especifique a moeda utilizada para os cálculos de custo:

• Dólares norte-americanos

4.4 Atividades de implantação

	Atividade	Tipo de medida	Periodicidade
1.	Plant the young trees with small pits.	Estrutural	Before practice
2.	The soils from the upper parts of the slope is shovelled away and deposited on the lower side of the trees	Estrutural
3.	Expand the pits into a large platform year by year.	Estrutural
4.	3.4 years after planning the trees a level platform of 2 to 3 square meters around the trees is build.	Estrutural
5.	The platforms increase and the space between trees is change into terrace.	Estrutural

4.5 Custos e entradas necessárias para a implantação

	Especifique a entrada	Unidade	Quantidade	Custos por unidade	Custos totais por entrada	% dos custos arcados pelos usuários da terra
Mão-de-obra	Planting trees	Person/day	120,0	7,3	876,0	100,0
Mão-de-obra	Building pits	Person/day	750,0	7,3	5475,0	100,0
Custos totais para a implantação da tecnologia					6351,0

Comentários:

Duration of establishment phase: 60 month(s)

4.6 Atividades recorrentes/manutenção

	Atividade	Tipo de medida	Periodicidade/frequência
1.	Repair the bank of year-after-year terraced land	Estrutural	Annual after it formed

4.7 Custos e entradas necessárias pata a manutenção/atividades recorrentes (por ano)

	Especifique a entrada	Unidade	Quantidade	Custos por unidade	Custos totais por entrada	% dos custos arcados pelos usuários da terra
Mão-de-obra	Reparing of terraced land	Person/day	15,0	14,6	219,0	100,0
Custos totais para a manutenção da tecnologia					219,0

Comentários:

Machinery/ tools: spade and hoe

The costs are calculated assuming a local wage rate of 14.2 US$/day.

4.8 Fatores mais importantes que afetam os custos

Descreva os fatores mais determinantes que afetam os custos:

Slope is the most important factor. The steeper it is, the higher the cost. Labour was not considered as a cost before, but now it is expensive so that some local farmers do not use this technology.

5.1 Clima

5.2 Topografia

Indique se a tecnologia é aplicada especificamente em:

• Não relevante

Comentários e outras especificações sobre a topografia:

Altitudinal zone 501-1,000 m a.s.l.: Most area is in this altitudinal zonation

Landforms: Based on 1:100 thousand scale landform map

Slopes on average: Based on 1:100 thousand scale landform map

5.3 Solos

Caso disponível anexe a descrição completa do solo ou especifique as informações disponíveis, p. ex. tipo de solo, PH/acidez do solo, nitrogênio, capacidade de troca catiônica, salinidade, etc.

Soil depth on average: The depth of Loess varies from nearly 30 m to more than 100 m in Yanhe River Basin. The depth of soil is less than this but it could be nearly 10 meters in common

Soil texture (topsoil): Here are more than 50% soil particle are fine sand with size between 0.05 and 0.1 mm

Soil fertility very low: Lack of N, P and SOM

Topsoil organic matter: <0.5%

Soil drainage / infiltration good: The inflitration of Loess is very fast, but it is prone to sealing when flashing.

Soil water storage capacity low: It is easy to evaporation and drainage

5.4 Disponibilidade e qualidade de água

Comentários e outras especificações sobre a qualidade e a quantidade da água:

Availability of surface also poor/ none: Nearly all the branches of Yanhe are seasonal river

Availability of surface water medium: It is very stable in this region

Water quality (untreated): Good quality for there are few pollution sources

5.5 Biodiversidade

Comentários e outras especificações sobre biodiversidade:

It is very stable in this region

5.6 Características dos usuários da terra que utilizam a tecnologia

Indique outras características relevantes dos usuários da terra:

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

Difference in the involvement of women and men: No clear difference.

Population density: 50-100 persons/km2

Annual population growth: < 0.5%

30% of the land users are rich and own 30% of the land (Higher yield and income.).

Off-farm income specification: Only a few land users have implemented this measure because there are other market based activities that bring higher returns. Sometimes farmers have enough money to buy more fertilizer for the orchard.

Level of mechanization: nearly all the work is done by hand.

Market orientation of production system: It is on apple production base and this generates good income of local farmers

5.7 Média da área de terra própria ou arrendada por usuários da terra que utilizam a tecnologia

5.8 Propriedade de terra, direitos de uso da terra e de uso da água

Propriedade da terra:

• Estado
• Comunitário/rural

Direitos do uso da terra:

• Indivíduo

Direitos do uso da água:

• Acesso livre (não organizado)

5.9 Acesso a serviços e infraestrutura

6.1 Impactos no local mostrados pela tecnologia

Impactos socioeconômicos

Produção

Renda e custos

Impactos socioculturais

Impactos ecológicos

Ciclo hídrico/escoamento

Solo

6.2 Impactos externos mostrados pela tecnologia

6.3 Exposição e sensibilidade da tecnologia às mudanças climáticas graduais e extremos/desastres relacionados ao clima (conforme o ponto de vista dos usuários da terra)

Mudança climática gradual

Mudança climática gradual

	Estação do ano	Tipo de mudança climática/extremo	Como a tecnologia lida com isso?
Temperatura anual		aumento	bem

Extremos (desastres) relacionados ao clima

Desastres meteorológicos

	Como a tecnologia lida com isso?
Temporal local	bem
Tempestade de vento local	não bem

Desastres climatológicos

	Como a tecnologia lida com isso?
Seca	bem

Desastres hidrológicos

	Como a tecnologia lida com isso?
Inundação geral (rio)	não conhecido

Outras consequências relacionadas ao clima

Outras consequências relacionadas ao clima

	Como a tecnologia lida com isso?
Período de crescimento reduzido	não conhecido

Comentários:

The technology increases infiltration, reduces soil erosion by water and improves soil moisture retention to reduce the negative impact of extreme drought. However, it does not protect the soil well from wind erosion. Soil cover could be increased to protect against strong winds and reduce

6.4 Análise do custo-benefício

Como os benefícios se comparam aos custos de implantação (do ponto de vista dos usuários da terra)?

Como os benefícios se comparam aos custos recorrentes/de manutenção(do ponto de vista dos usuários da terra)?

Comentários:

It is very cheap to maintain this measure. More trees could be planted on degraded land in future.

6.5 Adoção da tecnologia

• 10-50%

Se disponível, determine a quantidade (número de unidades familiares e/ou área abordada):

65 households (15percent of the stated area)

Entre todos aqueles que adotaram a tecnologia, quantos adotaram espontaneamente, ou seja, sem receber nenhum incentivo material/pagamentos?

• 90-100%

Comentários:

Comments on acceptance with external material support: There are no outside input to do sunch thing.

100% of land user families have adopted the Technology without any external material support

65 land user families have adopted the Technology without any external material support

Comments on spontaneous adoption: In this area, there are many other practices, such as reforestation, enclosure (to prevent grazing) and terrace construction.

There is a moderate trend towards spontaneous adoption of the Technology

Comments on adoption trend: Even the local farmers know the benefits of progressive bench terraces, but with the increased labour costs, fewer people apply this technology.

6.7 Pontos fortes/vantagens/oportunidades da tecnologia

Pontos fortes/vantagens/oportunidades na visão do usuário da terra
Higher yield and income. How can they be sustained / enhanced? If they have time, they wish to adopt this technology.

Pontos fortes/vantagens/oportunidades na visão do compilador ou de outra pessoa capacitada
Establishing the technology over a long time. Local farmers have enough time to do it How can they be sustained / enhanced? Show to land users that they have time and can spread to work over many years and fit the labour into the time they have available.
It can reduce water loss and soil erosion and prevent the degradation of land How can they be sustained / enhanced? Give subsidy to the local farmers to reduce the sediment delivery into the downstream river.
It can increase soil moisture. How can they be sustained / enhanced? Makes people understand the importance of conserving water with such a technology.
Higher yield and income. How can they be sustained / enhanced? Share ideas through meeting in the field. Present this measure to more people and show them how to apply it and promote the technology to more farmers.

6.8 Pontos fracos, desvantagens/riscos da tecnologia e formas de superá-los

Pontos fracos/desvantagens/riscos na visão do usuário da terra	Como eles podem ser superados?
It takes a lot of time to establish it.	It is difficult to use it, because the people could balance the establishment costs and work at the labour market. If they can get some subsidy from government, they may adapt this measure.

Pontos fracos/vantagens/riscos na visão do compilador ou de outra pessoa capacitada	Como eles podem ser superados?
It takes considerable time to establish and labour is more and more expensive so that farmers are looking for paid work	Subsidy for farmers using this measure.

7.2 Referências às publicações disponíveis

Título, autor, ano, ISBN:

Soil and water conservation records of Shaanxi Province. 2000. Shaanxi People's Press, Xi'an City, China

Disponível de onde? Custos?

Library of ISWC, CAS