余杭区耕地地力等级划分及养分空间分布研究  

Grade division and fertility spatial distribution of cultivated land in Yuhang District

作　　者：朱真令 麻万诸[2] 任周桥[2] 沈建国[3] 龙文莉[2] 吕晓男[1,2] 

机构地区：[1]浙江农林大学环境与资源学院,浙江临安311300 [2]浙江省农业科学院数字农业研究所,浙江杭州310021 [3]杭州市余杭区农业生态与植物保护管理总站,浙江杭州311100

出　　处：《浙江农业学报》2015年第8期1462-1467,共6页Acta Agriculturae Zhejiangensis

基　　金：省科技厅优先主题重点农业项目(2009C12049)

摘　　要：根据余杭区2 814个耕地地力调查和采样点数据,结合Arc GIS技术对余杭区37 772.3 hm2耕地地力进行评价与等级划分。研究结果表明,余杭区耕地质量整体较好,一到五级田所占比例分别为1.0%,39.6%,44.1%,13.1%,2.2%。一级田和二级田主要分布在平原区和沿河谷地,三级田和四级田主要分布在平原区向山区过渡的低山丘陵区,质量较差的五级田主要分布在西北部和西南部的山区。余杭区低山丘陵地带的土壤养分差异较大,平原地带的各项养分含量变异较小;全区耕地土壤全氮和有机质含量较为丰富,有效磷相对缺乏,速效钾含量变化较为平稳。Based on 2 814 survey sample data of cultivated land, comprehensive evaluation and classification for 37 772. 3 hm2 cultivated land in Yuhang District was conducted by ArcGIS technologies. It was shown that the overall quality of cultivated land were good, and the proportion of first to fifth class cultivated land was 1.0%, 39. 6%, 44. 1% , 13. 1% and 2. 2% , respectively. The first and second class farmland were mainly distributed in the plains and along the river valley. The third and fourth class farmland were mainly distributed in the transition zone of the plains to the mountains in hilly area. The fifth class farmland were mainly distributed in the mountainous area in the northwest and southwest. There were huge differences of soil nutrients in hilly areas, while there was smaller varia- tion of soil nutrients in plains. The total nitrogen and organic matter content of soil were abundant in arable land, while available phosphorus was relatively deficient. And the variation of available potassium content in Yuhang Dis- trict was relatively stable.

关 键 词：耕地地力 等级划分 土壤养分 

分 类 号：S153.6[农业科学—土壤学]