1.2 参与该技术评估和文件编制的资源人员和机构的联系方式

有助于对技术进行记录/评估的机构名称（如相关）

Missenyi District Council (Missenyi District Council) - 坦桑尼亚联合共和国

有助于对技术进行记录/评估的机构名称（如相关）

Bukoba district council (Bukoba district council) - 坦桑尼亚联合共和国

1.3 关于使用通过WOCAT记录的数据的条件

编制者和关键资源人员接受有关使用通过WOCAT记录数据的条件。:

是

1.4 所述技术的可持续性声明

这里所描述的技术在土地退化方面是否存在问题，导致无法被认为是一种可持续的土地管理技术？:

否

2.1 技术简介

技术定义:

Improved cassava production through the use of contour bund stabilized with cajanus cajan, manure application, cover crops (ground nuts) and improved cassava germplasm.

2.2 技术的详细说明

说明:

The technology involves a combination of structural, vegetative and agronomic land use practices aiming at improving production of cassava (Manihot esculenta), improving potential of the soil and environmental function of the land. The technology is among a list of basket of choices of SLM practices recently introduced and adapted to the area by land user and experts working with SCC-Vi Agroforestry an NGO contracted/outsourced by the Tras-boundary Agro-ecosystem Management Project (Kagera TAMP) for provision of SLM advisory and extension services.
Contour bunds are constructed across the sloppy landscapes of average slope 5 – 8 % and are arranged in rows from the top to the bottom of the slope. The average distance between contour bunds is 15 meters. A contour bund is a row of long narrow furrow of average width 90cm and average depth 30cm dug across the slope using simple tools and leveled using A-frame method. Dug soils are piled below the slope to form a long strip earth of fanya chini bund. The average height and width of a bund is 30cm and 45cm respectively. Pigeon pea (Cajanus cajan) are planted on contour bund to make them more stronger and productive. A single stand of pigeon pea has two plants and the distance between stands is 30 cm. Improved cassavas (Manihot esculenta) variety (mkombozi) that are resistant to cassava mosaic virus are planted in rows between contour bunds. Within rows, the space between cassavas is 1meter and between rows is 1meter. Manure application is applied before cassava planting at the rate of 2kgs per each plant hole. Cassava is usually planted on May and is harvested after one year. Cassava is planted together with groundnuts (Arachis hypogea) as a cover crop. Despite of having the nutritional advantage to farmers, pigeon pea and groundnuts also diversifies farmers’ livelihood income and have a key role of improving ecosystem through soil water conservation (prevent unproductive loss of green water) and improve soil fertility (through soil nutrient replenishment) and their after harvest remains are sources of organic matter.

Purpose of the Technology: The purpose of the technology is to:
1) Increase cassava productivity 2) Improved livelihood of the rural poor through diversification of income sources (cajanus cajan, groundnuts and cassava) and 3) conserve and restore ecosystem through soil fertility improvement (replacement of nutrients lost through uptake by plants), soil moisture improvement (by preventing blue water loss through runoff and green water loss through unproductive evaporation) and control of cassava pests and diseases (use of cassava varieties that are resistant to cassava mosaic virus).

Establishment / maintenance activities and inputs: Establishment activities include land preparation, ploughing and harrowing, contour bund construction and leveling using A-frame, manure procurement and application. Maintenance and recurrent activities involves collection of cassava planting materials and planting, vegetative stabilization of the bunds by planting Cajanus cajan, planting of cover crops (groundnuts within cassava farm), weeding/gap filling and harvesting.

Natural / human environment: The natural environment includes crop land dominated with separate annual crops. A combination of structural and vegetative measure (contour bund strengthened and made more productive with Cajanus cajan). Climatic zone is sub humid with 210 length of growing period (LGP). Slope category is moderate lying between 5-8%. Soil texture is gravel sandy loam with medium soil depth.
On human environment, mechanization is dominated by use of handy tools and occasional use of tractors. Production system is mixed (both for subsistence and commercial purposes). Inputs used includes tools (hand hoe, machete, sickles, spade and mattock), light and heavy labour, manure, seeds and cassava planting materials with average annual costs of 1033.47 USD per hectare. Land ownership is individual not titles. The expected average annual gross revenue per hectare accrued from cassava alone is 20580 USD.

2.3 技术照片

2.5 已应用该技术的、本评估所涵盖的国家/地区/地点

2.6 实施日期

如果不知道确切的年份，请说明大概的日期:

• 不到10年前（最近）

2.7 技术介绍

详细说明该技术是如何引入的:

• 通过项目/外部干预

注释（项目类型等）:

Recently introduced through interventions supported by Tran Boundary Agro-ecosystem management project (Kagera TAMP).

3.1 该技术的主要目的

• 改良生产
• 减少、预防、恢复土地退化
• 创造有益的经济影响

3.2 应用该技术的当前土地利用类型

同一土地单元内混合使用的土地：:

是

具体说明混合土地使用（作物/放牧/树木）:

• 农林业

注释:

Major land use problems (compiler’s opinion): Soil erosion caused by rainfall water runoff, low soil fertility due to excessive nutrient plant uptake without replenishment and moisture water stress.

Major land use problems (land users’ perception): Soil erosion, low moisture and low crop productivity.
Type of cropping system and major crops comments: cropping system is largely dominated with annual and perennial cropping and there is also some patches of agroforestry (largely fruit trees like avocados and mangoes).

3.4 供水

该技术所应用土地的供水:

• 雨养

3.5 该技术所属的SLM组

• 改良的地面/植被覆盖
• 土壤肥力综合管理

3.6 包含该技术的可持续土地管理措施

注释:

Specification of other vegetative measures: vegetative stabilization of bund using cajanus cajan
Specification of other structural measures: Contour bund construction

3.7 该技术强调的主要土地退化类型

注释:

Main causes of degradation: soil management (no use of soil fertlization measures), crop management (annual, perennial, tree/shrub) (Nutrient removal by plants without replenishment), disturbance of water cycle (infiltration / runoff) (no use of structural measures to control rainfal runoff and support infiltration), change in temperature (Soil moisture stress to excessive rise in temperature due to climatic change and variability), change of seasonal rainfall (Moisrure stress aring from reduction of the seasonal rainfall (due to climatic change and variability)), droughts (Soil moistrure stress due to unpredicted droughts), population pressure (Continuous use of the land without fallow periods or fertilility replenishment), poverty / wealth (Farmer incapacity to invest in sustainable land managment), labour availability (Migration of the youth to the town leaving behind the less enegetic elders incapable of managing labour intensive SLM), education, access to knowledge and support services (Lack of knowledge about SLM.), governance / institutional (No deriberate institutional support to SLM)

Secondary causes of degradation: inputs and infrastructure: (roads, markets, distribution of water points, other, …) (Water runoff intensified by nearby road construction)

3.8 防止、减少或恢复土地退化

具体数量名该技术与土地退化有关的目标:

• 防止土地退化
• 修复/恢复严重退化的土地

4.1 该技术的技术图纸

4.2 有关投入和成本计算的一般信息

其它/国家货币（具体说明）:

Tanzanian shillings

如相关，注明美元与当地货币的汇率（例如1美元=79.9巴西雷亚尔）：1美元=:

1700.0

4.3 技术建立活动

	活动	时间（季度）
1.	Planting cajanus cajan (perennial shrub)	once
2.	Construction of contour bunds	once
3.	Purchese tools
4.	Traction hire

4.4 技术建立所需要的费用和投入

	对投入进行具体说明	单位	数量	单位成本	每项投入的总成本	土地使用者承担的成本%
劳动力	Planting cajanus cajan (perennial shrub)	person/days	13.0	1.7	22.1	100.0
劳动力	Construction of contour bunds	person/days	13.0	3.46	44.98	100.0
设备	Tractor (hired)	pieces	1.0	95.0	95.0
设备	Tools	pieces	34.0	2.941	99.99	100.0
植物材料	Seeds	kg	6.0	27.0	162.0
技术建立所需总成本					424.07
技术建立总成本，美元					0.25

注释:

Duration of establishment phase: 1 month(s)

4.5 维护/经常性活动

	活动	时间/频率
1.	land preparation for tractor operation/ cleaning/grass slashing (usually occasional depends on land complexity)	November
2.	land manual harrowing (after tractor tilling).	November
3.	manure application	May
4.	Planting of cassava and groundnuts.	May
5.	weeding cassava, groundnuts and pigeon pea (done concurrently)	twice
6.	Harvesting and transportation of groundnuts.	Jully
7.	Harvesting and transportation of cassava (after one year)	May
8.	harvesting cajanus cajan	once
9.	Maintenance of the contour bunds (cleaning of the furrow floor/walls and reshaping of the bunds)	once

4.6 维护/经常性活动所需要的费用和投入（每年）

	对投入进行具体说明	单位	数量	单位成本	每项投入的总成本	土地使用者承担的成本%
劳动力	land preparation for tractor operation/ cleaning/grass slashing (usually occasional depends on land complexity)	person/days	13.0	1.7615	22.9	100.0
劳动力	land manual harrowing (after tractor tilling).	person/days	13.0	3.55	46.15	100.0
劳动力	manure application	person/days	13.0	3.55	46.15	100.0
劳动力	Planting of cassava and groundnuts.	person/days	13.0	0.88	11.44
植物材料	Groudnut seeds	kg	200.0	0.4706	94.12	100.0
植物材料	Cassava cuttings	cuttings	10000.0	0.011765	117.65
肥料和杀菌剂	Compost/manure	tons/ha	10.0	13.235	132.35
其它	Labour: weeding cassava, groundnuts and pigeon pea (done concurrently)	person/days	13.0	3.54	46.02	100.0
其它	Labour: Harvesting and transportation of groundnuts.	person/days	13.0	0.88	11.44	100.0
其它	Harvesting and transportation of cassava (after one year)	person/days	13.0	2.65	34.45	100.0
其它	Labour: harvesting cajanus cajan	person/days	13.0	1.76	22.88	100.0
其它	Labour: Maintenance of the contour bunds (cleaning of the furrow floor/walls and reshaping of the bunds)	person/days	6.0	3.83333	23.0	100.0
技术维护所需总成本					608.55
技术维护总成本，美元					0.36

注释:

Machinery/ tools: hand hoe, sickles, machete and mattock, hand hoe, spade, sickles and machete

The costs are calculated per unit hectare.

4.7 影响成本的最重要因素

描述影响成本的最决定性因素:

Manure application is the most cost determinant factor

5.1 气候

5.2 地形

说明该技术是否专门应用于:

• 凸形情况

关于地形的注释和进一步规范:

Altitudinal zone: 1001-1500 m a.s.l. (average attitudinal zonation is 1200 m a.s.l.)
Slopes on average: Moderate (average slope is between 5-6%)

5.3 土壤

如有可能，附上完整的土壤描述或具体说明可用的信息，例如土壤类型、土壤酸碱度、阳离子交换能力、氮、盐度等。:

Soil depth on average: Shallow (Soil depth is between 30 -50 cm)
Soil texture: Medium (Soil texture is sandy loam)
Soil fertility: Low (There is low soil fertility due to nature of soil and wash by rainfall runoff)
Topsoil organic matter: Low (easy washout of organic matter and nutrients due to the nature of the landscape and soil textural characteristics)
Soil drainage/infiltration: Good (The area is dominated by sandy loam soil which characteristically have good drainage and infiltration)
Soil water storage capacity: Medium (characteristics of sandy loam)

5.4 水资源可用性和质量

关于水质和水量的注释和进一步规范:

Ground water table: >50m (is difficult to access ground water table)
Availability of surface water: Also poor/none (There is no surface water in the area. People in the nearby or around the area fetch water from the natural springs found in the lower distant hilly/mountain floors)
Water quality: Good drinking water (water in the lower mountainous floors is in permanent water spring and is good drinking water)

5.5 生物多样性

关于生物多样性的注释和进一步规范:

Flora biodiversity is largely dominated by few species of natural grasses dominated by hyperenia rufa and with some limited amount of fauna (ants, earth worms and some insects).

5.6 应用该技术的土地使用者的特征

说明土地使用者的其他有关特征:

Population density: 10-50 persons/km2
Annual population growth: 0.5% - 1%

15% of the land users are rich and own 20% of the land (own land greater than 5 acres with reliable off farm income).
40% of the land users are average wealthy and own 40% of the land (own land not more than 5 acres with some pety business).
30% of the land users are poor and own 30% of the land (average land owned is 2 acreas).
15% of the land users are poor and own 5% of the land (land owned is less than 2 acres and rely on casual labourer).

Off-farm income specification: average rich and poor land users largely use the technology. On the other hand rich land users with reliable off farm income and very poor land users who largely relies on casual labourer seldom use the technology.
Market orientation: Mixed (cassava and groundnuts production are meant for subsistance and commercial use)
Level of mechanization: Manual work (manually using simple hand tools dominated by hand hoe)

5.7 应用该技术的土地使用者使用的平均土地面积

5.8 土地所有权、土地使用权和水使用权

土地所有权:

• 社区/村庄
• 个人，有命名

土地使用权:

• 社区（有组织）
• 个人

用水权:

• 社区（有组织）

注释:

Domestic water sources are for the use of all community but are governed by agreed management rules e.g. it is strictly prohibited to water the animals in domestic water sources and there is clear identification and demarcation of areas used for washing and collecting water for drinking and cooking.

5.9 进入服务和基础设施的通道

6.1 该技术的现场影响

社会经济效应

生产

收入和成本

社会文化影响

生态影响

水循环/径流

土壤

生物多样性:植被、动物

减少气候和灾害风险

6.2 该技术的场外影响已经显现

6.3 技术对渐变气候以及与气候相关的极端情况/灾害的暴露和敏感性（土地使用者认为的极端情况/灾害）

渐变气候

渐变气候

	季节	增加或减少	该技术是如何应对的？
年温度		增加	不好

气候有关的极端情况（灾害）

气象灾害

	该技术是如何应对的？
局地暴雨	不好
局地风暴	未知

气候灾害

	该技术是如何应对的？
干旱	不好

水文灾害

	该技术是如何应对的？
比较和缓的（河道）洪水	未知

其他气候相关的后果

其他气候相关的后果

	该技术是如何应对的？
缩短生长期	好

注释:

Cover crops (groundnuts) where used to provide vegetative cover and to some extent reduce the effect of excessive soil moisture loss due to direct sunlight and by reducing the speed of rainfall runoff.

6.4 成本效益分析

技术收益与技术建立成本相比如何（从土地使用者的角度看）？

技术收益与技术维护成本/经常性成本相比如何（从土地使用者的角度看）？

注释:

At the beginning only slightly positive benefits are realized this is caused by the high investment/establishment costs. But with time benefits are very positive and overcomes establishment costs (non recurrent costs e.g. due to construction of contour bunds).

6.5 技术采用

• > 50%

如若可行，进行量化（住户数量和/或覆盖面积）:

34 households and 100% of the area covered

在所有采用这项技术的人当中，有多少人是自发的，即未获得任何物质奖励/付款？:

• 11-50%

注释:

76% of land user families have adopted the Technology with external material support
17 land user families have adopted the Technology with external material support
Comments on acceptance with external material support: 13 members groups participated in 0.25 acre plot of cassava as test crop

24% of land user families have adopted the Technology without any external material support
17 land user families have adopted the Technology without any external material support
Comments on spontaneous adoption: early adopters

There is a little trend towards spontaneous adoption of the Technology
Comments on adoption trend: it is early to give the overall picture of technology adoption as it was recently introduced in April 2013.

6.7 该技术的优点/长处/机会

土地使用者眼中的长处/优势/机会
Simple to learn/ farmers gained soil fertilization knowledge.
Farmers gained soil management skills through learning by doing

编制者或其他关键资源人员认为的长处/优势/机会
The technology contributes in improved crop production and productivity.
Contour bund are stabilized with cajanus cajani which contributes to farmers nutrition and income.
Cover crops (groundnuts) that are grown within cassava are alternative sources of income to farmer before cassava is ready for harvesting and also improves soil fertility and moisture.

6.8 技术的弱点/缺点/风险及其克服方法

编制者或其他关键资源人员认为的弱点/缺点/风险	如何克服它们？
High initial investment costs. Farmers are capital strapped and have low investment capacity.	Raise farmers investment capacity through establishment and their direct engagement to rural micro finance institutions (SACCOS and VICOBA).
Unintended results due to the negative effects of climatic change and variability	Find means and ways to mitigate adapt climatic change and variability (e.g. use of drought resistant varieties).
Contour bund construction is labour intensive and can not be performed by older people who lacks physical strength and energy.	Make sure that FFS groups compose a balance of youth and elders who can play complementary roles to each others.

7.1 信息的方法/来源