最佳实践的简短描述

The system is a unique indigenous cultivation technique used in all Matengo highlands to conserve soil moisture and minimize soil erosion. It is a grass fallow tide ridge system characterised by crop rotation and maintenance of soil fertility by compositing grass, weeds and crop residues. It is an intensive system of cultivation on steep mountain slopes. The system has sustained land productivity for at least 200 years in Mbinga District.|

地点

Matengo highlands of Mbinga District, Ruvuma Region, Southern Tanzania.|

指定地点内的自然环境简介。

Mbinga District is composed of mountains, valleys and plateaus that extends from 800 - 1900m above mean sea level. The District is divided into four major agroecological zones representing combinations of unique altitude ranges that have variable characteristics.|
Mbinga District is characterised with Haplic or Humic acrisols depending on their position in the topo sequence. At higher elevations the most common soils are highily leached yellow red soils which are well drained with good permiability. At lower elevations, soils are less leached brown red in colour sandy clay loams and sandy clays.|
Mbinga District is characterised by tropical temperate with a unimodal rainfall pattern. The rain season extends for at least six month from November through May with a colder dry season for the remainder of the year. Average minimum and maximum temperatures are 19 - 23 degree celcius and 29 - 31 degree celcius respectively. Average annual rainfall for the District is 1224mm.

居住在该地点及/或附近居民的普遍社会经济状况

Almost all income is derived from agriculture, coffee being the main cash source. At lower altitudes maize and beans are the main cash crops. Another sources of income is pig  and poultry keeping. |
The average income level for Mbinga District is Tshs 219,238,000 per year. Income per capital is 489,639 Tshs per year (According to 2006 household survey data)|
In Mbinga District the dominant land tenure system is customary land ownership with much of the land being un surveyed. Due to the nature of land tenure systems families have equal rights to use land although head of families have decisive rights.

根据哪些标准和/或指标（与战略无关），在确定建议的实践和相应的技术是否被认为是“最佳”时，应该基于哪些标准和/或指标（与战略无关）？

This Indiginious conservation technology ''Ngoro'' is considered best due to its efficiency in controlling soil erosion, increasing soil moisture at critical times of the year and maintaing soil fertility, consequently increasing both production and productivity. |

最佳实践解决的主要问题

Main problems addressed by this practice include soil erosion, soil moisture defficiency and loss of soil fertility.|

概述最佳实践解决的具体土地退化问题

1. Soil erosion;
2. Loss of soil fertility;

具体说明最佳实践的目标

1. To conserve soil fertility;
2. To increase soil water retention capacity;
3. To increase productivity; and
4. To improve soil structure.

按目标对主要活动进行简要的描述

Increased productivity is attained as a result of high soil fertility, water availability and better soil structure.|
Water retention capacity is improved through organic matter and micro pits which act as water micro catchment.
Soil fertility is improved by compositing grass, weeds and crop residues and also by crop rotation and planting of legumes. |
Soil structure is improved through addition of organic matter.

本技术的简要说明和技术规范

The Ngoro system is based on rows and pits that form a grid pattern. Usually men cut the grass and lay it in rows forming a grid and women do the cultivation. The rows which are 2m or 3m apart roughly follow contour lines, with distance between them depending on the amount of grass to be covered and the soil depth with which to cover it. The soil in the  squares is dug out and pulled on top of rows of grass. In this way one quarter of the work is done facing downhill and dragging the soil. Digging continues until the subsoil is exposed in each ngoro pit. The depth of the pits normally ranges between 10cm to 50cm. The crop is planted on the raised beds surrounding the ngoro pits. Maize is normally planted in one field as a pure crop and beans and peas are planted as pure crops on the other. The plant beds are clean weeded with the weeds being pulled out and thrown into the pits to form compost. After harvest crop residues are also thrown into the ngoro pits, the old soil beds are split and new beds formed over old pits. The new ngoro pits come to occupy the places where the former soil beds intersected. The rotation is strict, a grain crop, usually maize, alternating with a leguminous crop, normally beans and peas.|

技术开发机构的名称和地址

Mbinga District Council|District Executive Director,
Mbinga District,
Ruvuma,
Tanzania.|Permanent Secretary|Ministry of Agriculture and Food Security,
P.O. Box 9192,
Dar es Salaam,
Tanzania.
Email. psk@kilimo.go.tz

这项技术是合作开发的吗?

否

具体说明该技术推广的框架

• 地方自主性

当地利益相关者（包括CSO）的参与是否促进了技术的开发？

否

居住在该地区和/或附近的居民是否参与了该技术的开发？

是

通过什么手段？:

• 参与途径

描述现场影响（按类别划分的两类主要影响）

The on-site impacts of the Ngoro system are increased crop yields due to improved soil fertility and crop rotation.
Improved food security and income due to high crops yield.
Reduced land degradation due to controlled soil erosion.
Reduced land pollution due to minimal use of agro-chemicals
Improved land productivity due to reduction in soil erosion, increased nutrients, improved soil structure and moisture.|
Improved livelihood due to increased income levels and food supply.

描述两个主要的场外影响（即不是发生在现场，而是发生在周围区域）

Reduced eutrophication and soil contamination due to minimal use of agro-chemicals.
Reduced siltation downstream due to controlled soil erosion.

对生物多样性和气候变化的影响

解释原因:

1. The system minimizes expansion of cultivated lands hence protecting flora and fauna.
2. Ngoro system minimizes carbon emissions by reducing both vegetation and soil degradation.
3. Ngoro system enhances in-situ moisture content, soil fertility and soil structure acting as a potential adaptation strategy. |

是否进行了成本效益分析？

是否进行了成本效益分析？:

是

该技术是否传播/引进到其他地方？

该技术是否传播/引进到其他地方？:

是

传播/引进到哪里？:

Uluguru Mountains |Same district

您能否确定目前最佳实践/技术成功的三个主要条件？

Existing physical feature of the Mbinga District (i.e Steepy terrain)
Favourable weather condition of the area.
Scarcity of the agricultural land vs population.

可复制性

在您看来，您所提出的最佳实践/技术可以复制到其他地方，尽管有一定程度的适应？:

是

适应程度如何？:

• 地方
• 次国家
• 国家
• 次区域
• 区域
• 国际

人力资源相关

The Ngoro system is labour intensive and it involves both men and women.

与技术方面有关

Technically the system is simple, does not need highly skilled labour and uses simple tools.|