河西走廊制种玉米氮磷钾适宜用量及需肥进程  

Study on Fertilization Techniques of Nitrogen,Phosphorus and Potassium for Continuous Cropping of Seed Corn in East of Hexi Corridor

作　　者：孙宁科 李隆[2] 索东让 李小刚[3] 吴海燕 

机构地区：[1]甘肃省张掖市农科院,甘肃张掖734000 [2]中国农业大学资环学院,北京100193 [3]兰州大学,兰州730000

出　　处：《西北农业学报》2013年第9期95-100,共6页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：省科技厅列项支持(2010GASS06);国家科技支撑计划(2011BAD29B04)

摘　　要：通过多点田间试验，对河西走廊制种玉米氮磷钾适宜施用量及需肥进程进行研究。结果表明，制种玉米N、P2O5、K2O适宜施用量分别为300、90、75 kg/hm，N、P2O5、K2O利用率分别为33.8%、18.0%、72.0%；生产100 kg种子吸收N、P2O5、K2O分别为2.56、1.11、4.02 kg。制种玉米拔节前段需肥量较大，氮、磷、钾分别占总吸收量的43.6%、37.8%和58.3%；拔节~抽雄分别占22.1%、27.8%和18.3%；抽雄~灌浆期分别占26.4%、19.4%和14.5%；后期较少，分别占8.0%、15.7%和8.9%。Optimal NPK fertilizer application and fertilizer demand were studied through multipoint field experiment in hexi corridor seed production, and the optimal application of N, P2O5 and K2O was 300, 90, 75 kg per hectare, respectively. The average utilization of nitrogen, phosphorus and potassium was 33.8%,18.0% and 72.0%, respectively; the accumulation of nitrogen, phosphorus and potassium was 2.56, 1.11 and 4.02 kg respectively for producing 100 kilograms of seeds. Maximum nutrient requirement was needed in jointing stage and the requirement rate of nitrogen, phosphorus, potassium was 43.6%,37.8%,58.3% respectively, it was 22.1%, 27.8% and 18.3% in tasseling stage, 26.4%, 19.4% and 14.5% in filling stage, 8.0%, 15.7% and 8.9% for mature stage. These important parameters can provide the basis for the reasonable applying fertilizer for seed corn.

关 键 词：制种玉米 养分吸收量 养分利用率 施肥时期 

分 类 号：S513[农业科学—作物学]