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？:

03/08/2003

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:

Cultivation of tree belts across the direction of wind at appropriate intervals in the deposition zone, with a view to arrest wind erosion and facilitate stabilisation of dunes through interbelt development.

2.2 技术的详细说明

说明:

The technology comprises establishment of 5 row shelterbelts at 160 m intervals. 3 row intermediary shelterbelts are introduced in between existing shelterbelts at 80 m interval. Land owners are encouraged to cultivate tree crops in between the belts.

Purpose of the Technology: Shelterbelts are useful in reducing wind velocity, there by arresting shifting of sand dunes, deposition of sand on fields, habitation, wells, roads etc. Cultivation of area between tree belts is made possible leading to increase in productivity from these lands.

Establishment / maintenance activities and inputs: The shelterbelts comprise tree species of different heights planted in rows (5 and 3 row deep) in a straight line across the wind direction. Six month old seedlings are planted in pits of volume 1 cuft to 1.5 cuft, which are filled with tank silt. One borewell is provided for one km length for life saving irrigation.

Natural / human environment: The environment is arid and forms the deposition zone wherein sand lifted from the impact zone is deposited. Sand dunes cover the area.

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 Department of Agriculture Engineering implemented shelterbelts since 1958 in neighbouring Madurai district. The technology was introduced to Tirunelveli district by the department in 1978 wherein 5 row shelterbelts were established.

3.1 该技术的主要目的

• 改良生产
• 保护生态系统

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): Crops cannot be cultivated due to sand deposition. Grass cover cannot develop due to shifting of dunes. Hence the area is neglected and degrades further. Only hardy species (ef. Palymra) and coarse grasses survive. Predominant land use is open grazing.

Major land use problems (land users’ perception): Land cannot be cultivated economically due to arid conditions, shifting dunes and open grazing.

Type of cropping system and major crops comments: Cultivation is practiced only in years of good rainfall. Single crop of pulse (black gram ) is taken.

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

注释:

Water supply: Also mixed rainfed - irrigated (ranked 2)

每年的生长季节数:

• 1

具体说明:

Longest growing period in days: 100 Longest growing period from month to month: Oct - Dec

3.4 该技术所属的SLM组

• 防风林/防护林带

3.5 技术传播

注释:

Total area covered by the SLM Technology is 100 m2.

The technology was implemented in the sand dune belt locally known as 'theri', located between the western mountain range and east coast of south India. The technology was initially implemented by the Government of Tamil nadu state in 1978 till 1985. The Danida supported project implemented by the department of Agricultural Engineering began activities to strengthen existing shelter belts, introduce inter belts and mass plantation from 1991 till 1999. The technology was initially implemented in an area much wider than the their lands, but experience showed that the shelterbelts was not the best methodology for low wind agricultural areas, so a shift to agro forestry and mass planting occurred.

3.7 该技术强调的主要土地退化类型

注释:

Main type of degradation addressed: Eo: offsite degradation effects

Secondary types of degradation addressed: Ed: deflation and deposition

4.1 该技术的技术图纸

4.2 技术规范/技术图纸说明

Technical Drawing - Shelterbelt

Technical knowledge required for field staff / advisors: high

Technical knowledge required for land users: moderate

Main technical functions: reduction in wind speed

Secondary technical functions: improvement of ground cover, arresting movement of sand

Slope (which determines the spacing indicated above): 2.00%

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）:

Indian Rupee

注明美元与当地货币的汇率(如相关):1美元=:

48.85

4.4 技术建立活动

	活动	措施类型	时间
1.	Nursery raising	植物性的	May-Nov
2.	Pitting	植物性的	Oct-Nov
3.	Filling of pits	植物性的	Nov-Dec at plantation
4.	Life watering	植物性的	Nov-Dec at plantation
5.	Periodic watering	植物性的	weekly during 1st year, except monsoon
6.	Provision of shade to saplings	植物性的	at planting

4.5 技术建立所需要的费用和投入

注释:

Duration of establishment phase: 60 month(s)

4.6 维护/经常性活动

	活动	措施类型	时间/频率
1.	Watering	植物性的	2 & 3rd year after plantation /fortnightly, except monsoon
2.	Casualty replacement	植物性的	2nd year /monsoon
3.	Watch & ward	植物性的	upto 5th year /full time watchman

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:

The above costs cover an establishment period of 5 years for 1 hectare (250 plants) of shelterbelt; year 1: pitting, planting, watering. Year 2 & 3: periodic watering, watch and ward, prunng, gap filling. Year 4 & 5: watch and ward, pruning. Of the total number of 391 mandays/ha. of shelterbelt, 288 mandays go towards periodic watering over the first 3 years. Watering of plants is essential due to the semi-arid climate and sandy soil. In addition, as supportive technology for provision of water, one borewell with handpump was established per kilometer of shelterbelt.

5.1 气候

5.2 地形

关于地形的注释和进一步规范:

Landforms: Plateau/plains (undulating terrain)
Slopes on average: Gentle (undulating)

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: Very deep (due to deposition by wind)
Soil texture: Coarse/light (sandy soil),
Soil fertility: Very low (low organic matter)
Topsoil organic matter: Low (low vegetative cover)
Soil drainage/infiltration: Good (permeability is high)
Soil water storage capacity: Very low (sandy soil, low organic matter)

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: 50-100 persons/km2
Annual population growth: 1% - 2%
38% of the land users are average wealthy (traders, labor).
42% of the land users are poor (small farmers, without water source).
20% of the land users are poor (small farmers, without water source).
Off-farm income specification: traders, employed in cashew processing plants, small industries, nearby towns, migration.
Level of mechanization: Manual work (in addition bullocks are used for ploughing)

5.8 土地所有权、土地使用权和水使用权

土地所有权:

• 个人，有命名

土地使用权:

• 自由进入（无组织）

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

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

• 0-10%

注释:

100% of land user families have adopted the Technology with external material support

5000 land user families have adopted the Technology with external material support

Comments on acceptance with external material support: estimates

There is a little trend towards spontaneous adoption of the Technology

Comments on adoption trend: Farmers are in favour of raising orchards to combat wind erosion and increase production in place of shelterbelts..

7.2 参考可用出版物

标题、作者、年份、ISBN:

Review Reports

可以从哪里获得?成本如何?

Chief Engineer, Agriculture Engineering Department, Anna Salai-439, Nandanam, Chennai-600035

标题、作者、年份、ISBN:

Project Implementation Plans, Project documents

可以从哪里获得?成本如何?

Programme Coordinator, WDCU, 11/1 Sarvapriya Vihar, New Delhi-110016.