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）

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

1.3 关于使用通过WOCAT记录的数据的条件

（现场）数据是什么时候汇编的？:

05/12/2008

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:

Earth embankment formed by digging a channel and pile the soil to form a ridge on which potato is planted.

2.2 技术的详细说明

说明:

Sweet potato ridge are constructed from the soil dug out of the furrow. Farmers make the furrow and ridge by dengora and a hoe. In some cases oxen scoop are used to move the soil and form the embankment. Sweet potato is planted by cuttings. It is often planted during the end of the main rainy season. There are different methods employed in making ridge and furrows. The furrows are meant to collect rain water and the cuttings of sweet potato planted on the ridge. The plant benefits from the soil water stored by the farrows. It has deep roots that go deep insearch of soil water. Water could also move up by capillary movement. Forming the ridges and basin is quite labours. The ridges are frequently made new and in some cases the former ridges and furrows are maintained. The technology suits to sub-humid and semi arid agro-ecological zones having sandy loam soils.

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:

• 50多年前（传统）

2.7 技术介绍

详细说明该技术是如何引入的:

• 作为传统系统的一部分（> 50 年）

注释（项目类型等）:

Originated locally from long term experiences and improvments

3.1 该技术的主要目的

• 改良生产

3.2 应用该技术的当前土地利用类型

注释:

Major land use problems (compiler’s opinion): Soil mositure stress, erosion and over population.
Major land use problems (land users’ perception): Shortage of rains, lack of finance for purchasing improved seeds and fertilizers.
Type of cropping system and major crops comments: Sorghum-Sweet Potato-Maize-Legumes

3.3 有关土地利用的更多信息

该技术所应用土地的供水:

• 雨养

每年的生长季节数:

• 1

具体说明:

Longest growing period in days: 21 0Longest growing period from month to month: May - Nov

3.4 该技术所属的SLM组

• 集水
• 灌溉管理（包括供水、排水）
• 引水和排水

3.5 技术传播

具体说明该技术的分布:

• 均匀地分布在一个区域

如果该技术均匀地分布在一个区域上，请注明覆盖的大致区域。:

• 100-1,000 平方千米

3.6 包含该技术的可持续土地管理措施

3.7 该技术强调的主要土地退化类型

注释:

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

Secondary types of degradation addressed: Cn: fertility decline and reduced organic matter content

Main causes of degradation: deforestation / removal of natural vegetation (incl. forest fires), overgrazing, poverty / wealth (lack of captial)

Secondary causes of degradation: over-exploitation of vegetation for domestic use, other human induced causes (specify) (agricultural causes), education, access to knowledge and support services (lack of knowledge)

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 技术规范/技术图纸说明

Oromia

Technical knowledge required for field staff / advisors: moderate

Technical knowledge required for land users: moderate

Main technical functions: increase of infiltration, increase / maintain water stored in soil, water harvesting / increase water supply

Secondary technical functions: control of dispersed runoff: retain / trap, reduction of slope length, increase in soil fertility

Better crop cover
Material/ species: Sweet potato
Quantity/ density: 20000-2500
Remarks: along the contour

Mixed cropping / intercropping
Material/ species: maize, sorghum, chat
Remarks: row and broadcast

Contour planting / strip cropping
Material/ species: Sorghum, chat

Cover cropping
Material/ species: Sorghum, chat, maize

Green manure
Material/ species: Sweet potato

Aligned: -contour
Vegetative material: T : trees / shrubs, F : fruit trees / shrubs, C : perennial crops
Number of plants per (ha): 1500
Vertical interval between rows / strips / blocks (m): 0.2
Spacing between rows / strips / blocks (m): 2.5
Vertical interval within rows / strips / blocks (m): 2
Width within rows / strips / blocks (m): 2.5

Trees/ shrubs species: some accacia trees

Fruit trees / shrubs species: apple, mango

Perennial crops species: chat

Slope (which determines the spacing indicated above): 3.00%

If the original slope has changed as a result of the Technology, the slope today is (see figure below): 3.00%

Gradient along the rows / strips: 0.00%

Retention/infiltration ditch/pit, sediment/sand trap
Spacing between structures (m): 1.5-2
Depth of ditches/pits/dams (m): 0.2-0.5
Width of ditches/pits/dams (m): 0.5-1
Length of ditches/pits/dams (m): 50-70

Structural measure: Ridge and furrows
Spacing between structures (m): 2-3
Height of bunds/banks/others (m): 0.3-0.6
Width of bunds/banks/others (m): 0.51
Length of bunds/banks/others (m): 50-70

Construction material (earth): Soil dug is embanked to form the ridge

Slope (which determines the spacing indicated above): 3%

If the original slope has changed as a result of the Technology, the slope today is: 3%

Lateral gradient along the structure: 0%

For water harvesting: the ratio between the area where the harvested water is applied and the total area from which water is collected is: 1:1

4.3 有关投入和成本计算的一般信息

其它/国家货币（具体说明）:

Birr

注明美元与当地货币的汇率(如相关):1美元=:

8.6

4.4 技术建立活动

	活动	措施类型	时间
1.	Seed bed preparation	植物性的	dry season
2.	Pitting	植物性的	after rain
3.	Manuring	植物性的	all season
4.	Planting	植物性的	during rains
5.	Cultivation	植物性的	during rains
6.	Excavation (furrow formation)	结构性的	dry period
7.	Embankment (ridge forming)	结构性的
8.	Planting sweet potato	结构性的	rainy season

4.5 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	ha	1.0	73.0	73.0	100.0
设备	Animal traction	ha	1.0	35.0	35.0	100.0
植物材料	Seedlings	ha	1.0	25.0	25.0	100.0
肥料和杀菌剂	Compost/manure	ha	1.0	50.0	50.0	100.0
技术建立所需总成本					183.0

4.6 维护/经常性活动

	活动	措施类型	时间/频率
1.	Tillage	农业学的	dry season / each cropping season
2.	Harrowing	农业学的	dry season / each cropping season
3.	Contour ridging	农业学的	dry season / each cropping season
4.	Planting	农业学的	rainy season / each cropping season
5.	Cultivation	农业学的	rainy season / 2-3
6.	Reconstructing basins, ridges and tie	植物性的	dry eason /
7.	Applying more manure	植物性的	all season /
8.	Repair of ridges and furrows	结构性的	before planting/1
9.	Placing of fertile soil on the ridges	结构性的	before planting/2
10.	Applying manure during cultivation	结构性的	after planting/1

4.7 维护/经常性活动所需要的费用和投入（每年）

注释:

Total labour expended to till the land, pulverize it, harrow and making of the ridges. The cost further include the monetary estimate of manuring the land and purchasing of the sweet potato cuttings, assuming these are purchased from market.

4.8 影响成本的最重要因素

描述影响成本的最决定性因素:

Soil dryness and texture-light soils are very simple for opration and the least cost is incurred. Loam soils are good soils with moderate cost of investment.

5.1 气候

5.2 地形

关于地形的注释和进一步规范:

Altitudinal zone: 1001-1500 m a.s.l. (ranked 1), 1501-2000 m a.s.l. (ranked 2) and 2001-2500 m a.s.l. (ranked 3)
Landforms: Also hill slopes (ranked 2)
Slopes on average: Also gentle (ranked 2) and moderate (ranked 3)

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: Also Deep and shallow (both ranked 2)
Soil fertility: Medium
Soil drainage/infiltration: Good (ranked 1) and medium (ranked 2)
Soil water storage capacity: Medium

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: 200-500 persons/km2
Annual population growth: 2% - 3%
25% of the land users are rich and own 30% of the land.
50% of the land users are average wealthy and own 50% of the land.
25% of the land users are poor and own 20% of the land.
Level of mechanization: Animal traction (sweet potato is mostly planted on level and gentle slopes and hence land preparation is made largely by oxen, ranked 1) and manual work (ranked 2)
Market orientation: Subsistence (ranked 1, most part consumed at home) and mixed (ranked 2, small portion of the sweet potato is sold at market)

5.7 应用该技术的土地使用者拥有或租用的平均土地面积

5.8 土地所有权、土地使用权和水使用权

土地所有权:

• 州

土地使用权:

• 个人

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

其它生态影响

6.2 该技术的场外影响已经显现

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）？

6.5 技术采用

注释:

85% of land user families have adopted the Technology with external material support

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

There is a strong trend towards spontaneous adoption of the Technology

Comments on adoption trend: more farmers are practicing the technology

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
Improve production How can they be sustained / enhanced? Use of high yielding varieties and fertilizers
Reduces risk of crop failure How can they be sustained / enhanced? Encourage more crop type

编制者或其他关键资源人员认为的长处/优势/机会
Efficiently controls soil erosion How can they be sustained / enhanced? The ridges retard surface flow and the furrow provide space for rain water storage
Allows maximum storage of rain water
Improves water storage capacity of soils How can they be sustained / enhanced? Sweet potato improves the soil structure by initiating microbial activities
Reduces evapotranspiration rate of soil moisture How can they be sustained / enhanced? Sweet potato provide dense ground cover and hence reduce evapotranspiration losses
Improves soil fertility How can they be sustained / enhanced? Sweet potato is naturally a soil fertility enhancing crop.