不同节水灌溉方式下N肥在土壤中的空间变异研究  

Spatial Variability of N Fertilizer in Soil Under Different Water-Saving Irrigation Modes

作　　者：张建新[1] 王爱云[2] 吕昭智[3] 王丽玲 

机构地区：[1]新疆农垦科学院水土所,新疆石河子832000 [2]新疆农垦科学院新技术中心,新疆石河子832000 [3]中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011 [4]新疆库车县种子管理站,新疆库车842000

出　　处：《农业环境科学学报》2006年第B09期543-545,共3页Journal of Agro-Environment Science

基　　金：中国科学院知识创新重大项目(KZCX1-08-01)

摘　　要：为深入研究N肥运移规律并为制定不同节水灌溉方式的施肥制度提供理论依据,采用Surfer软件对节水灌溉条件下N素在土壤中的分布动态进行了分析研究。结果表明,膜下滴灌条件下N素的运移深度为40cm,侧渗为20cm;膜下软管灌施条件下N素运移深度为60 cm以下,侧渗范围为50cm。从养分浓度方面看,膜下滴灌N素浓度最高,其次为膜下软管灌施,它们的模型为二次方程。Through analysis and research by utilizing software Surfer, it is concluded that translocation of N fertilizer in soil under different water-saving irrigation modes is characterized by that： in case of under-film trickle irrigation, translocation depth of nitrogen is 40 cm, while the lateral seepage is 20 cm. In case of under-film hose irrigation, the depth is less than 60 cm, while the lateral seepage is 50 cm. Additionally, in terms of nutrient concentration, nitrogen content with under-film trickle irrigation is the highest, that with under-film hose irrigation is the next. It has been discovered that their models are quadratic equations, making it possible to be as reference for further research on regulation of translocation of N fertilizer in the future, and may also offer a theoretical basis in formulation of fertilizer-applying system with different water-saving irrigation modes.

关 键 词：膜下滴灌 膜下软管灌 N肥 浓度 模型 

分 类 号：S158.5[农业科学—土壤学]