Valuation of cropland capacity classes in Guangdong;
广东省耕地地力等级研究与评价
A preliminary study on the land capacity change of twelve returning cultivated land to forest models in Xichong county of southeastern Yunnan was conducted by ocean weather station observation.
通过对滇东南西畴县石漠化山地12种不同退耕还林模式的土壤进行定点观测和地力变化分析,结果表明:土壤物理性状有很大改善,土壤抗蚀性和储水性增强,土壤养分提高,土壤吸收保存养分离子能力增强。
The results showed that the land capacity of rendzina is the highest and the land capacity of terra rossa is higher,which resulted by closing hillsides to facilitate afforestation for many years of rendzina,and balance fertilizing of terra rossa.
通过对滇东南西畴县石漠化山地4种不同土类的理化性质进行定点观测和地力变化的分析,结果表明:黑色石灰土的肥力较佳,其次是红色石灰土,这是由于黑色石灰土多年来进行封山育林,红色石灰土进行了平衡施肥;3年后黄色石灰土的理化性质有很大改善,土壤肥力有很大提高,这是退耕还林的结果;说明退耕还林、封山育林和耕地的平衡施肥有利于石漠化山地土壤肥力的改善。
Using soil types as evaluation units and their yield as a basis, the cultivated land productivity grade system of Shandong Province is estab.
合理利用和保护耕地是我国的基本国策 ,本研究基于农业部“全国耕地类型区、耕地地力等级划分”标准 ,通过NOAA气象卫星图像分析 ,将山东省耕地划分为 2个耕地类型区和 4个亚区。
The development of defensive measures and the progress of defensive abilities reflect in four aspects: defensive measures of "making the best use of land",grain reserves of fair deal for famine,defensive project against disaster such as canalizing and irrigating,and defensive measures against flood such as damming and planting.
战国防灾措施及能力的飞跃体现在4方面:“尽地力之教”一类的防灾措施;“平籴法”之类的仓储备荒;开渠灌溉类的防灾工程;修堤造林类的防洪举措。
The aim of this paper is to study how to evaluate farmland productivity through the combination of GIS technology with traditional methods of evaluating soil productivity.
研究利用GIS技术,结合传统耕地地力评价方法,提出一种基于GIS技术的县域耕地地力评价方法。
Results show that AHP adapt to judge the weight of each evaluation factor and intergraded to quantificational and qualitative in evaluation of farmland productivity.
以宁乡县为例,根据耕地资源特点及耕地地力评价的原理,采用层次分析法确定耕地地力评价因子的权重。