玉米-花生混作对系统内氮营养的影响研究  

Effects of mixed cropping of maize and peanut on the N nutrition in cropping system

作　　者：房增国[1] 左元梅[2] 李隆[2] 张福锁[2] 

机构地区：[1]莱阳农学院农学系,莱阳265200 [2]中国农业大学植物营养系,北京100094

出　　处：《中国生态农业学报》2005年第3期63-64,共2页Chinese Journal of Eco-Agriculture

基　　金：国家自然科学基金项目(30170185);博士启动基金项目(630426)资助

摘　　要：试验研究玉米-花生混作对系统内N营养的影响结果表明,种植密度花生∶玉米=5∶3混作对玉米、花生单株生物量、植株全N及单株吸N量均无明显影响,但显著降低混作花生根际土壤NO3--N浓度,同时显著增加混作花生根瘤数,提高单株根瘤固N酶活性。Effects of mixed cropping of maize and peanut on the N nutrition in cropping system were studied.The results indicate that mixed cropping density of maize and peanut(peanut∶maize=5∶3)has no significant effects on biomass,total N and N uptake per plant of maize and peanut,but can obviously reduce NO^-_3-N concentration in the rhizosphere of peanut and improve peanut nodule number and peanut nodule nitrogenase activities(ARA)per plant peanut.

关 键 词：玉米 花生 混作 生态系统 氮营养 根瘤数 固氮酶 

分 类 号：S513[农业科学—作物学] S565.2