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/评估的项目名称（如相关）

The Transboundary Agro-ecosystem Management Project for the Kagera River Basin (GEF-FAO / Kagera TAMP )

有助于对技术进行记录/评估的机构名称（如相关）

Food and Agriculture Organization of the United Nations (FAO) - 意大利

有助于对技术进行记录/评估的机构名称（如相关）

Kabale District Local Government (Kabale District Local Government) - 乌干达

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

2.1 技术简介

技术定义:

Contour hedges of Calliandra planted on very steep slopes to combat soil erosion by decreasing surface runoff and increasing infiltration.

2.2 技术的详细说明

说明:

Calliandra Calothyrsus trees are closely planted along the contours on hilly and steep slopes to create natural and effective barriers for reduction of the surface runoff and retention of eroded sediment. Calliandra hedge barriers are a fairly cheap, effective, and sustainable way of controlling soil erosion and landslides on vulnerable steep slopes, especially where trash lines and Napier grass strips were inadequate to mitigate dispersed and concentrated soil and water runoff. Once established, the living barrier is durable with minimal additional maintenance cost to the farmer apart from pruning. The average length of a hedgerow is 50 to 70 m, corresponding to the width of a single terrace. The height varies according to intended use of the mature shoots. To use the stems as stakes, the hedgerow is allowed to reach a height of 4 to 6 m at maturity while a height of 1 to 2 m is sufficient for harvesting foliage as livestock fodder. The hedge barrier reaches its mature, maintenance level after 12 to 18 months.

Purpose of the Technology: The main purpose of the Calliandra hedge barrier is to reduce soil and water runoff.Calliandra is a leguminous shrub with deep roots that provids additional benefits such as soil stabilization and soil fertility improvement through nitrogen fixing. Calliandra is a source of fodder and its flowers attract bees.

Establishment / maintenance activities and inputs: At the beginning of the rainy season, calliandra seedlings are transplanted from the nursery (0.2m to 0.3m height) and planted in a row (0.3m spacing). In the early stages, gap-filling with more seedlings may be necessary as some fail to get established. A mixture of top soil and manure is applied in the spaces between the seedlings and watering is done to improve the seedling survival rate. The distance between rows is 10 to 15 m and depends on the gradient of the slope. Establishment of hedges starts with construction of an earth banked terrace, creating a trench at the lower end of the terrace. Calliandra seedlings are planted on the higher side of the trench. Measuring off 10 m lengths upwards into the terrace, other rows of Calliandra seedlings are planted along the contour in order to achieve the inter-row spacing. Establishment is manual labor intensive and therefore the community, organized as Farmer Field Schools, participates in the planting, one field at a time. Simple tools such as hand hoes, sokajembe (pick-axe) and shovels are used. Maintenance is achieved by weeding, mulching and cutting back. For it to establish well, Calliandra needs to be weeded to minimize competition with weeds for water and nutrients . The weeds also harbour pests. It may also be necessary to mulch the area around each seedling during the dry season. Where mulching is done, the mulch is placed at least 0.05m away from the plant to reduce pest attacks. Calliandra calothyrsus trees are cut back at a height of 2m to between 0.15m and 1m to improve foliage which is used as fodder for livestock. The hedge is then maintained at a height of 1 to 6 m depending on the intended additional uses. The branches removed can be used as fuel wood or stakes, while leaves can be used as fodder.

Natural / human environment: The hedge barrier may be attacked by pests. Scales are white, powdery insects that attack Calliandra stems. Scales can be controlled using washing detergents such as ‘Omo’ dissolved in water and sprinkled on affected plants using leafy branches or a knapsack sprayer. Black ants can seriously damage trees. They can be controlled by spraying. Other likely pests are crickets and grass hoppers which affect seedlings in nurseries, and Armillaria mellea, a fungus that attacks roots of Calliandra plant causing root rot and eventual death. Affected plants are uprooted and burnt. In addition, calliandra is affected by hot, dry weather. During the hot, dry weather, the hedge barrier becomes weak. However during the wet season it sprouts again, and, if well managed, becomes healthy again. A well-maintained hedge barriers can last well over 20 years.

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）:

The technology was introduced by ICRAF in 2006 and scaled-up Kagera TAMP project 2 years ago.

3.2 应用该技术的当前土地利用类型

注释:

Livestock density (if relevant):

1-10 LU /km2

Major land use problems (compiler’s opinion): The slopes are steep >30% to very steep >60%), with very high precipitation (>1440 mm). Severe surface erosion and landslides may occur at the beginning of the rains, before sufficient vegetation covers the soil. Continuous cultivation with little external inputs and nutrient transfer affects negatively soil fertility and in results reduces crops growth/vegetation cover, leading to erosion on steep slopes.

Major land use problems (land users’ perception): Floods are common in the valleys over the past ten years.

Improved pasture: Diary hiefers,pigs(largewhite and layers)pasture include calliandra,stellia and elephant grass.

Constraints of settlement / urban: floods invade houses

Constraints of infrastructure network (roads, railways, pipe lines, power lines): transport problem

3.4 供水

该技术所应用土地的供水:

• 雨养

3.6 包含该技术的可持续土地管理措施

注释:

Type of vegetative measures: aligned: -contour

3.7 该技术强调的主要土地退化类型

注释:

Main causes of degradation: soil management (Poor vegetative cover/no trees to bind soil particles.), Heavy / extreme rainfall (intensity/amounts) (Rainfall intensifying in september and April.), other natural causes (avalanches, volcanic eruptions, mud flows, highly susceptible natural resources, extreme topography, etc.) specify (steep slopes (extreme topography)), population pressure (Population increase/no of people increased per sq km), poverty / wealth (lack of resources to implement known natural resources degradation mitigation measures)

Secondary causes of degradation: education, access to knowledge and support services

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
• 减少土地退化

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）:

UGX

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=:

2602.0

4.3 技术建立活动

	活动	时间（季度）
1.	Establishment of Calliandra nursery	Dry season
2.	Plantation of Calliandra seedling on the higher side of the trench	Wet season
3.	Weeding

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	Labour		1.0	44.6	44.6	100.0
设备	tools		1.0	16.2	16.2	100.0
植物材料	seedlings		1.0	30.4	30.4	100.0
植物材料	seeds		1.0	9.6	9.6	100.0
技术建立所需总成本					100.8
技术建立总成本，美元					0.04

注释:

Duration of establishment phase: 18 month(s)

4.5 维护/经常性活动

	活动	时间/频率
1.	Prunning and triming the hedge barriers	wet/dry season

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	labour		1.0	20.8	20.8	100.0
设备	tools		1.0	16.2	16.2	100.0
植物材料	seedlings		1.0	1.0	1.0	100.0
其它						100.0
技术维护所需总成本					38.0
技术维护总成本，美元					0.01

注释:

Machinery/ tools: I panga,1 watering can, 1hoe.

The cost assesment above refers to steep slopes.

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:

The cost of seedlings (0.20 US$ each) and their transport up along steep slopes are the key factors affecting costs and hindering spontaneous adoption of the technology. Otherwise, the technology is acceptable to farmers as benefits are easily visible in the short run.

5.1 气候

5.2 地形

5.3 土壤

5.4 水资源可用性和质量

5.5 生物多样性

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:

Difference in the involvement of women and men: Maintenance such as pruning trimming is mostly done by the men, but the other activities are done by both men and women.
Population density: 200-500 persons/km2
Annual population growth: 2% - 3%; 3%
5% of the land users are rich and own 40% of the land.
30% of the land users are average wealthy and own 30% of the land (meets basic needs/necesities).
45% of the land users are poor and own 20% of the land.
20% of the land users are poor and own 10% of the land.

Off-farm income specification: Crop and animal production greatly increased for land users implementing conservation measures , compared to those who do not implement.

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:

• 个人，未命名

土地使用权:

• 个人

注释:

The land belongs to an individual with no title but has all the rights over it.

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

其它生态影响

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	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	好

气候灾害

	该技术是如何应对的？
干旱	好

水文灾害

	该技术是如何应对的？
比较和缓的（河道）洪水	好

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	未知
n/a

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:

Benefits are high compared to establishment and maintenance cost

6.5 技术采用

注释:

88% of land user families have adopted the Technology with external material support

45 land user families have adopted the Technology with external material support

12% of land user families have adopted the Technology without any external material support

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

There is a moderate trend towards spontaneous adoption of the Technology

Comments on adoption trend: The technology is appreciated by most farmers but adoption is limited by cost of seedlings and transportation up steep slopes

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
Calliandra binds the soil, thus reduces landslides. How can they be sustained / enhanced? It should be maintained through proper management
Adds scenic beauty on a plot How can they be sustained / enhanced? By regular trimming
Calliandra is good and attractive to bees How can they be sustained / enhanced? Leave every second or third row to flower

编制者或其他关键资源人员认为的长处/优势/机会
It is easy to establish and maintain How can they be sustained / enhanced? Promote education campaign and spread information
It has helped to increase crop and animal production How can they be sustained / enhanced? By proper management and not overgrazing animals
Stabilize the soil and strenghtening resistance to intensive rainfall and fast runoff How can they be sustained / enhanced? Promote technology through increased community mobilization
Very effective to reduce soil erosion How can they be sustained / enhanced? Combine with other practicies e.g. mulching

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？
The hedge barrier is ineffective before 12 months	Combine with trash lines before establishment
Technology harbors nesting birds	Ensure regular trimming of Calliandra to reasonable height and use scarecrows
Needs at least 2 seasons to establish	Apply manure and water to the seedlings to ensure accelerated growth
May reduce the amount of sunlight available to young crops if left untrimmed	Trim regularly
Extra cost in protecting from damage by livestock	Inter-crop with other fodder species to act as alternative fodder for livestock

7.1 信息的方法/来源

7.2 参考可用出版物

标题、作者、年份、ISBN:

Kagera TAMP Project website

可以从哪里获得?成本如何?

http://www.fao.org/nr/kagera/en/