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）

有助于对技术进行记录/评估的机构名称（如相关）

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:

A farmer’s indigenous practice of growing sweet potato as a relay crop to its main crop of either rice or corn.

2.2 技术的详细说明

说明:

It is the planting of sweet potato together with rice/corn on the same area, hence, maximizing the area for crop production. Specifically, a local sweet potato variety called “mayaman” is planted one to two months after planting rice/corn and is being cultivated in the field in between the rows of the above-mentioned main crop. The “mayaman” variety is selected by the farmers due to its excellent food quality and ability to produce more roots at its vine, enabling staggered harvesting and extending period of utilization. However, in some instances, rice and corn were planted at the same time.

Purpose of the Technology: The main purpose of using creeping type of sweet potato is to provide cover to the soil which addresses soil moisture conservation primarily during growing period and after main crop harvesting time. It also protects the soil against erosion. Moreover, it provides additional and alternative food source for the farmers, in case the main crop fails due to some reasons.

Establishment / maintenance activities and inputs: The main crop, either corn or rice, is planted first with a specified planting distance--75cm between rows and 75cm between hills with 2 to 3 seeds per hill (for corn) and 30cm between rows and 20cm between hills with 5 to 6 seeds per hill (for rice). After one month, the sweet potato cuttings are planted in between rows of the main crop at a distance of 1.5m between hills.

Natural / human environment: This relay cropping system is locally known as “lapat” in the areas of Matalom and Bato, Southern Leyte where it is commonly practiced.The soil in these areas is characterized as mostly acid soil. Whereas, its topography is generally comprises from rolling to steep hills. In terms of climate, rainfall is more or less evenly distributed throughout the year and typhoons usually occur during the months of October or November. In addition, most of local farmers cultivated 1 to 2 parcels with farm size from 0.12 to 5.95 hectares with farming as the principal source of livelihood and income. The fields ot the farms are basically rainfed because it is totally dependent on rainfall as water supply for irrigation.

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

国家:

菲律宾

区域/州/省:

Matalom, Southern Leyte

具体说明该技术的分布:

• 均匀地分布在一个区域

如果不知道精确的区域，请注明大致覆盖的区域:

• < 0.1 平方千米（10 公顷）

注释:

This is a traditional practice done by most of the farmers in the municipality of Matalom, Leyte.

Map

×

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）

3.2 应用该技术的当前土地利用类型

农田

• 一年一作

年作 - 具体指明作物:

• 谷物类 - 玉米
• 根/块茎作物 - 红薯、山药、芋头/椰子，其他

• rice

每年的生长季节数:

• 2

注释:

Major food crop: Rice, corn
Others: Sweet potato

Major land use problems (compiler’s opinion): soil erosion, soil moisture

Major land use problems (land users’ perception): soil erosion

3.4 供水

该技术所应用土地的供水:

• 雨养

3.5 该技术所属的SLM组

• 轮作制度（轮作、休耕、轮垦）
• 改良的地面/植被覆盖

• Intercropping

3.6 包含该技术的可持续土地管理措施

农艺措施

• A1：植被和土壤覆盖层
• A3：土壤表面处理

注释:

Main measures: agronomic measures

Type of agronomic measures: relay cropping

3.7 该技术强调的主要土地退化类型

土壤水蚀

• Wt：表土流失/地表侵蚀

物理性土壤退化

• Pc：压实

生物性退化

• Bc：植被覆盖的减少

水质恶化

• Ha：干旱化

注释:

Main type of degradation addressed: Wt: loss of topsoil / surface erosion, Bc: reduction of vegetation cover

Secondary types of degradation addressed: Pc: compaction, Ha: aridification

Main causes of degradation: soil management (contouring is not practice in sloping areas), other natural causes (avalanches, volcanic eruptions, mud flows, highly susceptible natural resources, extreme topography, etc.) specify (topography)

Secondary causes of degradation: crop management (annual, perennial, tree/shrub) (annual cropping), 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

注释:

Main goals: mitigation / reduction of land degradation

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

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=:

45.0

4.4 技术建立所需要的费用和投入

4.5 维护/经常性活动

4.6 维护/经常性活动所需要的费用和投入（每年）

5.1 气候

5.2 地形

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 fertility is medium
Soil drainage/infiltration is medium
Soil water storage is medium

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:

Seasonality of water quality: Spring

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: 200-500 persons/km2
Annual population growth: < 0.5%
Level of mechanization is manual labour or animal traction (carabao)
Market orientation: subsistence (food consumption of the family)

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

• mixed land ownership

土地使用权:

• 租赁
• 个人

用水权:

• 自由进入（无组织）

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

收入和成本

社会文化影响

生态影响

水循环/径流

土壤

减少气候和灾害风险

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

气候有关的极端情况（灾害）

气候灾害

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，有多少人是自发的，即未获得任何物质奖励/付款？:

• 91-100%

注释:

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

There is a little trend towards spontaneous adoption of the Technology

6.7 该技术的优点/长处/机会

6.8 技术的弱点/缺点/风险及其克服方法

7.1 信息的方法/来源