摘要
采用农户调查和室内试验相结合的方式,研究内陆盐碱地农田管理方式对土壤理化性质的影响。结果表明,作物种植方式主要有小麦—玉米轮作、小麦—棉花轮作、西瓜—棉花套种、玉米—大豆间作和春玉米单作5种。这5种种植方式的土壤有机质、碱解氮、速效磷和速效钾平均含量分别为20.1,60.1,106.2和170.2mg/kg,不同种植方式间差异显著,西瓜—棉花套种方式的养分含量最高。不同种植方式下,土壤碱解氮含量最高值仅为70.2mg/kg,应适当增施氮肥;土壤速效磷含量平均值高于作物所需磷含量15mg/kg,应适当减少磷肥的施用;土壤速效钾平均值为170.2mg/kg,应根据作物对钾的需求特点,控制钾肥的使用。
The effects of farmland management on soil physicochemical properties in an inland saline-alkali land were studied through household survey and indoor experiment.Results showed that there were the five crop planting modes of wheat—maize rotation,wheat—cotton rotation,melon—cotton interplant,maize—soybean interplant,and spring maize monoculture.The average contents of soil organic manure,alkali-hydrolyzable nitrogen,available phosphorus,and available potassium under the five planting modes were 20.1,60.1,106.2,and 170.2 mg/kg,respectively.The differences between the planting modes were significant and the soil nutrient contents were the highest under the melon—cotton interplant mode.Under the different planting modes,the highest content of soil alkali-hydrolyzable nitrogen was only 70.2 mg/kg,which suggests that nitrogen fertilizer should be added;the average content of soil available phosphorus was 15 mg/kg higher than what the plants need,which implies that phosphorus fertilizer should be reduced;and the average content of available K was 170.2 mg/kg,which implies that K fertilizer should be controlled according to the needs of crops.
出处
《水土保持通报》
CSCD
北大核心
2012年第1期50-53,共4页
Bulletin of Soil and Water Conservation
基金
公益性行业(农业)科研专项经费项目"鲁北低平原内陆盐碱障碍耕地农业高效利用技术模式研究与示范"(200903001-7-3)
滨州学院博士科研启动基金项目"农田土壤磷素环境风险评价研究"(2008Y008)
关键词
种植方式
有机质
碱解氮
速效磷
速效钾
planting pattern
organic manure
alkali-hydrolyzable nitrogen
available phosphorus
available potassium
