通过多点田间试验和实验室测定研究了河西走廊制种玉米施肥效率,结果表明,制种玉米氮(N)、磷(P2O5)、钾(K2O)养分最佳施用量分别为300 kg hm-2、90 kg hm-2和75 kg hm-2,比盲目施肥节约氮肥33.3％～50.0％,磷肥40％～50％.氮磷钾肥的农学效率分别为7.6、8.0和8.4;氮磷钾吸收量平均为190.0 kg hm-2、84.3 kg hm-2、296.8 kg hm-2;百公斤种子氮磷钾需求量平均为2.46 kg、1.03 kg、3.53 kg;氮磷钾养分生理效率分别为40.6、99.0和28.3;肥料利用率分别为32.4％、21.4％、72.0％,比盲目施肥分别提高了51.4％、76.8％,有效提高了施肥效率.
Study on Fertilizer Efficiency of Seed Corn under Ridge Cultivation with Plastic Film Mulching-Furrow Irrigation
Fertilizer efficiency of seed corn was studied through multipoint field experiment and laboratory test in Hexi Corridor.The results showed that the optimal application of N,P2O5,K2O was 300,90,75 kg per hectare,respectively.Compared with fertilizing blindly,it could cut down 33.3％ ～ 50.0％ of nitrogen fertilizer application and 40％ ～ 50％ of phosphorus fertilizer application,respectively.Agronomic efficiency of NPK was 7.6,8.0 and 8.4,with the NPK absorption of 190.0 kg hm-2,84.3 kg hm-2,296.8 kg hm-2,respectively.The average absorption of N,P2O5,K2O was 2.46 kg,1.03 kg,3.53 kg respectively for producing 100 kg seeds.Physiological efficiency of NPK was 40.6,99.0 and 28.3 respectively.Compared with fertilizing blindly,the fertilizer utilization ratio was 32.4％,21.4％,72.0％ respectively,increasing by 51.4％ and 76.8％ significantly.
NETL
NSTL
万方数据
维普
