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）

Local Agricultural Research and Extension Centre (LAREC) - 柬埔寨

有助于对技术进行记录/评估的机构名称（如相关）

Society for Community Development in Cambodia (SOFDEC) - 柬埔寨

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？:

03/07/2014

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

1.5 请参阅有关SLM方法的问卷

2.1 技术简介

技术定义:

Some points of the System of Rice Intensification (SRI) technology, like the row transplanting of young seedlings and the use of compost are adapted and applied in Kampong Chhnang.

2.2 技术的详细说明

说明:

The System of Rice Intensification (SRI) was developed in the 1980s in Madagascar, where a French monk worked together with local farmers. The goals of the project were the improvement of the livelihoods of local farmers and the establishment of a farming system that is self-sufficient and thus needs no external inputs. SRI is not a recipe to be followed step by step, but general ideas that need to be adapted to the local conditions. These basic ideas are the following:
- Early transplanting of the seedlings, at the two-leaves-stage (less than 15 days after sowing). At this stage, the plant still has the potential to make a lot of tillers, and develop a strong root system. The seedlings are transplanted carefully, so the plant doesn’t suffer a transplanting shock.
- Wide spacing of single seedlings, usually in squares. The recommended spacing goes from 25 to 50 cm, depending on the soil fertility. This transplanting technique reduces the concurrence between the rice plants and allows the land user easier weeding.
- Aerating the soil. Rice is produced in standing water, but grows better if the roots are aerated. This is usually done with weeding, and additionally either by alternately flooding and letting the soil dry out, or by draining the water regularly. - The soil is fed with compost or manure in order to enhance the fertility and improve the soil structure.
SRI induces changes in deeply rooted local habits with some counter-intuitive knowledge like that more seeds do not produce more yields. Thus the methods have to be adapted locally and yields monitored to fit to other areas.

In Kampong Chhnang, the rice is transplanted at the six-leaves-stage, which is still earlier than conventional transplanting, with spacing of about 15 to 20 cm.

In Kampong Chhnang, the labour availability is low, as many young people work abroad or in the garment industry. Thus the SRI principles, which were taught by an NGO in 2004, were not followed completely, but adapted to this major constraint. The use of very young seedlings requires careful transplanting, which takes time. Thus the seedlings are transplanted at the 6 leaves stage. Due to the low soil fertility in the area, the optimal spacing as tested by CARDI (Cambodian Agricultural Research and Development Institute), was about 20 by 20 cm.

The rice seeds are soaked in water for 24 hours, and then let to germinate in a hot and humid place for two days. Then they are sown on the seed bed, which is prepared with compost. As there is not enough compost available for all the fields, the seedbed is the only place where compost is applied. In the fields chemical fertilizer is used. The seedlings are transplanted after 20 to 25 days (5-6 leaves) single or two per hill, in rows 15 to 20 cm apart. They are transplanted in better levelled fields than conventional transplanting, to allow the use of less water, as the seedlings are smaller than conventional. Otherwise the water management is the same as conventional; due to the lack of labour availability, the fields are not drained as proposed by the NGO 10 years ago. The field is weeded with hoes. The rice is harvested after 85 % of the panicle turned yellow, thus obtaining the best quality.

The analysed area is flat (slope < 2%), with a tropical climate (dry season from November to May and wet season from June to October), and the soils are mostly sandy or loamy. The soil has a low fertility, contains little organic matter, and acidifies. The area has been deforested a long time ago, and the groundwater table is rather high (1-2 m during the dry season, on the surface during wet season).
Due to climate change, farmers notice more erratic rainfalls, temperature rises and more recurrent droughts. Rice is the predominant crop grown in the area, since it serves as staple food (mix subsistence and commercial activities).

The increasing migration rate (the young generation leaves the villages to work in the cities, garment industry or abroad) results in a decrease of available labour force in the area which has detrimental effects on the agricultural activities. Furthermore, the civil war in the 1970s (Khmer Rouge) led to the loss of agricultural knowledge which different NGOs try to re-establish.

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:

• 通过项目/外部干预

注释（项目类型等）:

In 2004, SRI was introduced to the land user of this case study by SOFDEC. Then the farmers adapted and transformed some steps.

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): Lack of organic matter, lack of water retention in soil, irregularity of rainfall, low soil fertility (sandy soil), monocultures, bare soil during dry season, ploughing.
Major land use problems (land users’ perception): Low soil fertility, sandy soil with low water retention.

3.3 有关土地利用的更多信息

该技术所应用土地的供水:

• 混合雨水灌溉

每年的生长季节数:

• 1

具体说明:

Longest growing period in days: 210, Longest growing period from month to month: June-December

3.4 该技术所属的SLM组

• 土壤肥力综合管理

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。:

• 10-100 平方千米

3.6 包含该技术的可持续土地管理措施

注释:

Type of agronomic measures: better crop cover, manure / compost / residues

3.7 该技术强调的主要土地退化类型

注释:

Main causes of degradation: soil management (The soil is ploughed and left bare for weeks in the dry season), crop management (annual, perennial, tree/shrub) (Rice monocultures), over-exploitation of vegetation for domestic use (No organic matter is left on the fields), labour availability (High migration rates.), education, access to knowledge and support services (Khmer Rouge regime led to the loss of agricultural 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

Cambodia
Date: 25.10.2011

Technical knowledge required for field staff / advisors: high
Technical knowledge required for land users: moderate
Main technical functions: increase in nutrient availability (supply, recycling,…)
Secondary technical functions: increase in organic matter

Better crop cover
Material/ species: Rice
Remarks: Single or 2 young rice seedlings per hill, in rows, space 15-20 cm

Manure / compost / residues
Material/ species: 2 – 3 t of compost for the seed bed (0.25 ha, transplanted on 1 ha), 75 kg/ha after transplanting.
Quantity/ density: 2-3 t

4.3 有关投入和成本计算的一般信息

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%
设备	Compost house		1.0	15.0	15.0	33.0
技术建立所需总成本					15.0

4.6 维护/经常性活动

	活动	措施类型	时间/频率
1.	Ploughing the seed bed (either part of the paddy fields or different field)	农业学的	1 / year
2.	Put seeds 24 hours in water	农业学的	1 / year
3.	Cover the seeds in a warm place for incubation until they sprout (approximately 2 days, temperatures between 37-40 °C), plant the seedlings in seed bed and let them grow for about 20 - 25 days	农业学的	1 / year
4.	Ploughing of rice paddy field	农业学的	2 / year
5.	Pull the seedling from seed bed, row transplanting of young rice seedlings (20-25 days): 1-2 seedlings per hill, not too deep into the soil, in 1-2 cm of water.	农业学的	1 / year
6.	Add chemical fertilizer to the paddy fields (20 days after transplanting)	农业学的	1 / year
7.	Weed control (easier because of row transplanting), done manually	农业学的	2 / year
8.	Harvest rice manually when plant is 85% mature.	农业学的	1 / year

4.7 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	ha	1.0	228.0	228.0	100.0
设备	animal traction	ha	1.0	56.0	56.0	100.0
植物材料	seeds	ha	1.0	15.0	15.0	100.0
肥料和杀菌剂	fertilizer	ha	1.0	55.0	55.0	100.0
肥料和杀菌剂	compost/manure	ha	1.0	10.0	10.0	100.0
技术维护所需总成本					364.0

注释:

Machinery/ tools: Plough; a hand weeder can be used for higher yields but not enough labour is available on the fields. 1 ha; farmer owns 2 ha; year 2014

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 factor affecting the costs the most is the labour. SRI is labour intensive; the farmer needs twice as much time for a SRI field than for a conventional field. This is the reason he makes only a few of the steps he was taught 10 years ago by SOFDEC.

5.1 气候

5.2 地形

5.3 土壤

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: during dry season
Availability of surface water: during dry season

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:

Land users applying the Technology are mainly common / average land users
Population density: 10-50 persons/km2
Annual population growth: 0.5% - 1%
Off-farm income specification: Handicrafts, factory work, remittances

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:

• 社区/村庄
• 个人，未命名

土地使用权:

• 社区（有组织）
• 个人

用水权:

• 自由进入（无组织）

注释:

Land users have a title that is not recognized by the state

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

水资源可用性和质量

收入和成本

社会文化影响

生态影响

土壤

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	未知

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	未知

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	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	未知

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 building of the compost house (only establishment cost) was subsidized, so he had to pay only 5 $ to build it. On the long term the addition of compost is very positive for the soil fertility.

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？:

• 10-50%

注释:

67% of land user families have adopted the Technology with external material support
33% of land user families have adopted the Technology without any external material support
20 land user families have adopted the Technology with external material support
10 land user families have adopted the Technology without any external material support
Due to the lack of labour force less farmers are applying the SRI 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
Improved soil structure and fertility due to the compost addition.

编制者或其他关键资源人员认为的长处/优势/机会
Improved yields (ca. 20%)
Better price possible if he applied SRI without chemical fertilizer and if he sold the yield on the organic market.

6.8 技术的弱点/缺点/风险及其克服方法

土地使用者认为的弱点/缺点/风险	如何克服它们？
The seedlings have to be treated with care.	More yields, less dependent on off-farm income.
Increases the workload.	Change the local agriculture to more perennials and animals to produce more organic matter (shift toward integrated farming).
SRI needs more compost than is available.

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 fields are always flooded, thus there are anaerobic conditions in the root area.	Either, the water can be drained before the rain, or the fields can alternatively be dried out and flooded.
The seedlings are much older at the 6 leaves stage than recommended by SRI.	Experiment with transplanting of younger seedlings.

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:

List of documentation about SRI in English

可以从哪里获得?成本如何?

http://sri.ciifad.cornell.edu/extmats/index.html#english (free)