供磷水平对间套作物根系酸性磷酸酶活性的影响  

Effects of P application on root acid phosphates of crops in intercropping

作　　者：张恩和[1] 

机构地区：[1]甘肃农业大学农业生态工程研究所,兰州730070

出　　处：《西北植物学报》2001年第1期53-58,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：甘肃省自然科学基金(ZS991-A21-030-N);中华农业科教基金(99-03-B-9)资助项目

摘　　要：选择小麦 /大豆和小麦 /玉米 2种模式 ,用盆栽法和根系栽培法研究不同供磷水平对间套作物根系酸性磷酸酶 ( APase)活性的影响。试验得出 :间套种植提高了根系 Apase的分泌量 ,套作大豆比单作大豆平均提高 35.9% ,而小麦和玉米在间套种植时也有不同程度地提高 ,说明间套种植有利于土壤有机磷向有效化方向转化。大豆不论单作还是间套作其根系APase都远高于相应小麦 ,而小麦又高于玉米 ,说明大豆利用土壤磷的潜在能力大于小麦 ,而小麦又高于玉米。可见 ,禾谷类的小麦与大豆间套后不但能改善小麦的氮素营养状况还使磷素营养也得以好转。Effects of P application on root acid phosphates (R APase) of wheat soybean and wheat corn in intercropping,were studied with pot method,the results showed that:Root APase activity was enhanced by intercropping,it was raised on an average 35.9% in wheat/soybean intercropping,than that in soybean monoculture, similar effect was also observed in wheat and corn intercropping.The order of R APase activity was soybean,wheat and corn.It illustrated that intercropping was advantageous for crops to use soil P.In wheat intercropped with soybean not only N situation could be improved but also P situation could be.

关 键 词：间套作 酸性磷酸酶 根系 施肥 

分 类 号：S344.2[农业科学—作物栽培与耕作技术]