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首页> 外文会议>ISPRS Technical Commission VIII Mid-Term Symposium >SITE SUITABILITY ANALYSIS FOR DISSEMINATION OF SALT-TOLERANT RICE VARIETIES IN SOUTHERN BANGLADESH
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SITE SUITABILITY ANALYSIS FOR DISSEMINATION OF SALT-TOLERANT RICE VARIETIES IN SOUTHERN BANGLADESH

机译：孟加拉国南部盐耐稻品种传播的现场适用性分析

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Bangladesh is a country of 14.4 million ha geographical area and has a population density of more than 1100 persons per sq. km. Rice is the staple food crop, growing on about 72% of the total cultivated land and continues to be the most important crop for food security of the country. A project "Sustainable Rice Seed Production and Delivery Systems for Southern Bangladesh" has been executed by the International Rice Research Institute (IRRI) in twenty southern districts of Bangladesh. These districts grow rice in about 2.9 million ha out of the country's total rice area of 11.3 million ha. The project aims at contributing to the Government of Bangladesh's efforts in improving national and household food security through enhanced and sustained productivity by using salinity-, submergence- and drought- tolerant and high yielding rice varieties. Out of the 20 project districts, 12 coastal districts are affected by the problem of soil salinity. The salt-affected area in Bangladesh has increased from about 0.83 million ha in 1973 to 1.02 million ha in 2000, and 1.05 million ha in 2009 due to the influence of cyclonic storms like 'Sidr', 'Laila' and others, leading to salt water intrusion in croplands. Three salinity-tolerant rice varieties have recently been bred by IRRI and field tested and released by the Bangladesh Rice Research Institute (BRRI) and Bangladesh Institute of Nuclear Agriculture (BINA). These varieties are BRRI dhan- 47 and Bina dhan-8 and - 10. However, they can tolerate soil salinity level up to EC 8-10 dSm~(-1), whereas the EC of soils in several areas are much higher. Therefore, a large scale dissemination of these varieties can be done only when a site suitability analysis of the area is carried out. The present study was taken up with the objective of preparing the site suitability of the salt-tolerant varieties for the salinity-affected districts of southern Bangladesh. Soil salinity map prepared by Soil Resources Development Institute of Bangladesh shows five classes of salinity. viz., non-saline with some very slight saline soil, very slightly saline with some slight saline soil, slightly saline with some moderately saline soil, strongly saline with some moderately saline soil, and very strongly saline with some strongly saline soil. The soil EC level of different classes range from 2 dSm~(-1) to >16 dSm~(-1). The soil map was geo-referenced and digitized using Arc GIS. Salinity tolerance characteristics of the rice varieties were matched with the soil characteristics shown on the map. Three suitability classes were made; soils suitable for salt-tolerant varieties, not suitable for salt-tolerant varieties due to high soil salinity, and suitable for other high yielding varieties due to slight salinity. The mauza (smallest revenue unit) boundary provided by the Bangladesh Agriculture Research Council was also geo-referenced and digitized in the same projection. Overlaying and intersecting the mauza boundary on the soil suitability map provided the suitable and not suitable mauzas. A total of 4070 mauzas in the 12 salinity-affected districts were listed and maps showing suitability of mauza prepared. About 0.6 million ha out of total 0.87 million ha salinity affected area were found suitable for growing the salinity-tolerant BRRI dhan-47, Bina dhan-8 and -10 in these districts. The maps and other generated information have helped the Dept. of Agriculture Extension (DAE) of Bangladesh in large scale dissemination of seeds of the salinity-tolerant rice varieties in different districts during the past two years.
机译：孟加拉国是一个1440万公顷地理区域的国家，人口密度超过1100多人每平方公里。米饭是主食作物，占总耕地的约72％，并持续成为该国粮食安全最重要的作物。孟加拉国二十南区国际大米研究所（Irri）执行了“南部南部可持续水稻种子生产和交付系统”。这些地区在该国总稻面积为1130万公顷的情况下将米饭增长约290万公顷。该项目旨在通过利用盐度，潜水和耐旱和高产水稻品种提高和持续生产力，为孟加拉国政府提供贡献。在20个项目区内，12个沿海地区受土壤盐度问题的影响。孟加拉国的盐水影响地区在1973年的约0.83亿公顷上升到2000年的10.2亿公顷，2009年有125万公顷，由于“SIDR”，“Laila”和其他人的影响，导致盐农作物的水侵入。最近由孟加拉国水稻研究所（Brri）和孟加拉国核农业研究所（Bina）测试和释放的Irri和田间培养了三种盐度耐水稻品种。这些品种是BRRI DHAN-47和BINA DHAN-8和10。但是，它们可以耐受土壤盐度水平到EC 8-10 DSM〜（-1），而几个地区的土壤EC要高得多。因此，只有在进行该区域的网站适当性分析时，才能进行大规模传播这些品种。本研究采用了制备南孟加拉国盐度受影响地区的耐盐品种的耐盐品种的遗址适用性的目的。孟加拉国土壤资源开发学院制备的土壤盐度图显示了五类盐度。 。，非盐水与一些非常轻微的盐渍土壤，非常盐水与一些轻微的盐渍土壤，微生物含有一些中等盐渍的土壤，强烈盐水与一些适度的盐渍土壤，以及一些强烈的盐渍土壤盐水。不同类别的土壤EC水平范围为2 dsm〜（-1）至> 16 dsm〜（-1）。土壤图是使用弧GIS的地理参考和数字化。水稻品种的盐度耐受特性与地图上显示的土壤特性相匹配。制作了三个适用性课程;土壤适用于耐盐品种，不适用于耐盐性耐盐性，由于水盐度高，适用于由于轻微盐度引起的其他高产品种。孟加拉国农业研究委员会提供的毛泽达（最小的收入单位）边界也在同一预测中进行地理参考和数字化。覆盖和交叉土壤适宜性地图上的毛泽造界线提供了合适的，而不是合适的毛地。列出了12个盐度受影响的地区共有4070个Mauzas，并展示毛泽和毛泽达的适用性。发现大约60万公顷的HA盐度受影响的区域，适用于这些地区的盐度容忍Brri Dhan-47，Bina Dhan-8和-10。地图和其他生成的信息已帮助孟加拉国农业延伸部（DAE）在过去两年中大规模传播不同地区的盐度耐多植物种子的大规模传播。

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