论文部分内容阅读
通过对集约化种植制度下黄淮海平原7个典型潮土区土壤有机质的调查,结合第二次土壤全国土壤普查资料,对潮土有机质的现状、分布及其演变特征进行了全面的分析和评价。结果表明,典型潮土区近81%面积土壤的有机质含量在10~20gkg-1之间,处于中等偏下水平,其空间变异性较弱,变异系数在30%以下;但随着农业管理制度的不断优化,潮土土壤有机质含量较二十年前有了较大的提高,各地增幅在50%以上,土壤肥力有了一定的提高。
Through the investigation of soil organic matter in seven typical tidal flat areas in the Huang-Huai-Hai Plain under the intensive planting system and the data of the second soil national soil survey, the status, distribution and evolution characteristics of organic matter in the tidal soil were comprehensively analyzed and evaluated . The results showed that the organic matter content of nearly 81% of the soil in the typical Chaozhai area was between 10 ~ 20gkg-1, which was at the middle-lower level with a weak spatial variability and the coefficient of variation was below 30%. However, with the agricultural management system The soil organic matter content in the Chao soil has been greatly increased over 20 years ago with an increase of more than 50% in all areas and a certain increase in soil fertility.