基于模型和GIS的农田有机肥供氮量时空变化分析  

A Model and GIS Based Analysis of Spatial and Temporal Change of Organic Nitrogen Supply

作　　者：朱大威[1] 黄耀[2] 金之庆[1] 卢燕宇[3] 

机构地区：[1]江苏省农业科学院农业资源与环境研究所,江苏南京210014 [2]中国科学院大气物理研究所,北京100029 [3]南京农业大学资源与环境科学学院,江苏南京210095

出　　处：《江苏农业学报》2007年第5期432-436,共5页Jiangsu Journal of Agricultural Sciences

基　　金：国家自然科学基金重点项目(40431001);中国科学院知识创新工程重大项目(KZCX1-SW-01-13)

摘　　要：将自主研制的有机肥氮素动态释放模型与地理信息系统（GIS）集成，对江苏省2000年农田有机肥供氮量（FOND）的空间变化以及1985～2000年间FOND的变化趋势和成因进行分析，并通过设置稻麦秸秆增量还田情景，评价进一步提高FOND的可能性。结果表明：1985年以来，全省平均FOND供应量逐年增加，苏东地区除射阳、大丰、启东等产棉区以外，大部分地区的FOND都较高，苏北地区次之，而苏中和苏南地区则相对较低。粮食单产提高、养殖业迅速发展、机收面积逐年扩大以及气候变暖是导致我省FOND总体提高的主要原因，秸秆加量还田可以进一步提高FOND。The spatial change of organic nitrogen supply in the fields （FOND） in 2000 and the ascending trend of FOND from 1985 to 2000 with its contributing factors in Jiangsu province were analyzed using a Nitrogen Releasing Model developed by the authors, combined with the GIS technique. In addition, the probability to increase FOND in the province in future was assessed by running the model under a scenario of increased straw incorporation. The results indicated the av- erage of FOND simulated was about 31 kg/hm2 in 1985 in the whole province and was steadily increased to 43 kg/hm2 in 2000. The values of FOND were the highest in the Eastern area of Jiangsu province, except for a few counties, such as Sheyang, Dafeng and Qidong where cotton crop was widely planted, followed by the Northern area of the province. The val- ues of FOND were lower in Southern Province due to universal zero tillage and direct-sowing rice. Increase in crop yields, rapid development of animal husbandry, expansion of farming area using machines and global climate warming were the main reasons leading to the increase in FOND. The more straw incorporation contributed to approximately 18% of FOND raise in the whole province.

关 键 词：有机肥 农田供氮量 氮素释放模型 GIS 

分 类 号：S147.5[农业科学—肥料学]