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:

Oasis gardens in Niger for crop, vegetable and fruit production are supplied with irrigation water from traditional wells.

2.2 技术的详细说明

说明:

In Timia Oasis in Aïr, small irrigated gardens (< 0.3 ha) have been used for over a century, producing dates and tree crops (figs, citrus, cherries, etc.) for sale and cereals for consumption (wheat, maize and pearl millet). With the onion boom in the 1990s, the establishment of new gardens grew dramatically. The new gardens cover a bigger area (0.5 - 1 ha) and focus on cash crops - mainly onions, but also potatoes and garlic. Gardens are fenced using branches from acacia trees. The water supply system in most cases is based on traditional wells with an animal-drawn scoop. The wells are less than 20 meters deep and generally built without a casing. Local experts were trained by GTZ project staff in well construction and maintenance. Modern motor pumps have recently become common and are used in new gardens. Water is conveyed to the plots through a hand-dug network of distribution channels. The channels are lined with clay and stones to minimize water loss through infiltration, evaporation, or breaching. Irrigating a whole garden takes about two hours. There are two cropping seasons per year: the rainy season (June-Sept) with staple crops such as maize and millet; and the dry/cold season (Oct.-Feb.) with wheat-barley associations and cash crops such as onions, garlic, tomatoes and vegetables. Fruit trees covering up to a fifth of the gardens; one section of the garden is reserved for keeping small ruminants. Agricultural residues are used as fodder and manure produced by livestock ensures fertility of gardens in combination with inorganic fertilizers. Traditional techniques (local plants, ash, etc) are used for pest management. Seed production and selection is done strictly locally.

Establishment / maintenance activities and inputs: The main establishment activities for this technology are: 1. Identify and demarcate of a free area to be converted into a garden. Fence area with acacia branches and living hedge. 2. Establish a traditional or cement well, max. 2 m wide and 15-20 m deep (contract with local well builder) in the middle of the field. 3. Installation of traditional water conveyance system (Tekarkat): wooden poles hold a pulley which conducts a rope with a scoop for extraction of water from the well. The system is powered by a dromedary. A 5-meter-chute (palm stem or iron sheet) conducts the water to a small reservoir.
4. Mark and dig irrigation canal system and basins for crop cultivation (8 m2): Main canal and secondary canals (perpendicular to main canal) are reinforced with clay or stones. 5. Purchase inputs (local market): seed, seedlings, fertilizer, tools. 6. Plant fruit trees.
Maintenance activities are the following: 1. Maintenance of fence: replace missing branches; plant new tree seedlings to reinforce the living hedge (biannually). 2. Irrigation (daily). 3. Maintenance of Tekarkat and canal system: control (and replace) poles; periodic weeding, cleaning, repair leaks and improve lining with clay/stones (biannually, after harvest). 4. Field preparation and application of organic manure (beginning of each cropping season). 5. Maintenance of well: cleaning (hot season), reinforce walls with cement (if needed).
6. Feeding draught animal using natural grassland and crop residues.

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:

• 10-50年前

2.7 技术介绍

详细说明该技术是如何引入的:

• 通过土地使用者的创新

注释（项目类型等）:

Ces jardins traditionnels ont tendance à être adoptés spontanément. La technologie a été une réponse aux sécheresses successives des années 1970 et 80 qui ont causé d’importantes pertes de bétail dans la région. Les éleveurs nomades ont adopté la technologie pour diversifier leurs moyens de subsistance et diminuer les risques. Depuis les années 1990, 700 nouveaux jardins ont été créés à Timia (comparé aux 100 qui existaient précédemment)

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): Desertification, soil erosion by wind and water, chemical and biological degradation of soil

Livestock is grazing on crop residues

3.3 有关土地利用的更多信息

每年的生长季节数:

• 2

具体说明:

Longest growing period in days: 150

Longest growing period from month to month: Oct-Feb

Second longest growing period in days: 90

Second longest growing period from month to month: June-Sept

3.6 包含该技术的可持续土地管理措施

注释:

Main measures: vegetative measures, structural measures

Type of agronomic measures: manure / compost / residues

Type of vegetative measures: scattered / dispersed

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, Et: loss of topsoil, Cn: fertility decline and reduced organic matter content, Bc: reduction of vegetation cover

Main causes of degradation: droughts

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:

• 减少土地退化
• 修复/恢复严重退化的土地

注释:

Main goals: mitigation / reduction of land degradation, rehabilitation / reclamation of denuded land

4.2 技术规范/技术图纸说明

Technical knowledge required for field staff / advisors: high

Technical knowledge required for land users: low (indigenous knowledge, extension from farmer to farmer))

Main technical functions: water spreading, increase of biomass (quantity), promotion of vegetation species and varieties (quality, eg palatable fodder)

Scattered / dispersed
Vegetative material: F : fruit trees / shrubs

Fruit trees / shrubs species: fig, citrus, cherries

4.4 技术建立活动

	活动	措施类型	时间
1.	Plant fruit trees	植物性的
2.	Identify and demarcate of a free area to be converted into a garden. Fence area with acacia branches and living hedge	结构性的
3.	Establish a traditional or cement well, max. 2 m wide and 15-20 m deep (contract with local well builder) in the middle of the field	结构性的
4.	Establish a traditional or cement well, max. 2 m wide and 15-20 m deep (contract with local well builder) in the middle of the field	结构性的
5.	Installation of traditional water conveyance system (Tekarkat)	结构性的
6.	Mark and dig irrigation canal system and basins for crop cultivation (8 m2): Main canal and secondary canals (perpendicular to main canal) are reinforced with clay or stones	结构性的
7.	5. Purchase inputs (local market): seeds, seedlings, fertilizer, tools	结构性的

4.6 维护/经常性活动

	活动	措施类型	时间/频率
1.	Field preparation and application of organic manure (beginning of each cropping season)	植物性的	beginning of each cropping season
2.	Maintenance of fence: replace missing branches; plant new tree seedlings to reinforce the living hedge (biannually)	结构性的
3.	Irrigation	结构性的	daily
4.	Maintenance of Tekarkat and canal system: control (and replace) poles; periodic weeding, cleaning, repair leaks and improve lining with clay/stones	结构性的	biannually, after harvest
5.	Field preparation and application of organic manure	结构性的	beginning of each cropping season
6.	Field preparation and application of organic manure	结构性的
7.	Maintenance of well: cleaning (hot season), reinforce walls with cement (if needed)	结构性的

4.7 维护/经常性活动所需要的费用和投入（每年）

注释:

Cost calculation is based on local land prices and traditional irrigation systems. Maintenance costs include also fodder (for draught animal) and organic manure. Establishment as well as maintenance costs were calculated for a garden size of 0.5 ha.

5.1 气候

5.2 地形

5.3 土壤

5.4 水资源可用性和质量

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:

Land users applying the Technology are mainly disadvantaged land users

Population density: > 500 persons/km2

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:

• 个人，未命名

土地使用权:

• 个人

• communal unorganised

• communal unorganised

注释:

The land user can be (1) the owner of the garden; (2) a family member managing the family-owned garden; (3) a paid labourer; (4) a usufructuary

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

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	气候变化/极端天气的类型	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	好
局地风暴	不好

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	不好

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	好

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:

The technology serves a double purpose: food security and income generation

6.5 技术采用

注释:

There is a strong trend towards spontaneous adoption of the Technology

Comments on adoption trend: Since the 1990ies, 700 new irrigated gardens were established in Timia (as compared to 100 gardens)

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 implementation costs	establish national financial support systems for acquisition of garden area by very poor people
High maintenance costs	promote efficient irrigation technologies that reduce maintenance costs (such as drip irrigation)
Uncontrolled spread of the technology resulting in an overexploitation of groundwater and over-production (e.g. onions)	increase water use efficiency; regulate market and promote agro-industrial food processing
High dependency on climatic factors influencing the recharge of the groundwater level	exploitation of deep water resources through artesian wells and introduction of adapted drip irrigation technologies

7.2 参考可用出版物

标题、作者、年份、ISBN:

Suchantke, J. and A. S. Soumaila. 2001. Etude cadre pour le programme NIGETIP IV, KfW, Niamey, Niger

标题、作者、年份、ISBN:

Soumaila, A. S., 2005. Rapport du symposium international sur le développement des filières agropastorales en Afrique organisé par GREAD.

标题、作者、年份、ISBN:

PPEAP. 2006. Rapport final d’évaluation du projet de promotion des exportations agropastorales

标题、作者、年份、ISBN:

Ministère du développement agricole. 2008, 2009. Données statistiques sur la production maraichère