不同施肥处理对玉米产量及子粒养分积累的影响

Effects of Different Fertilizer Treatment on Yield & Accumulated Nutrient of Maize Seed

以郑单958玉米为材料,在田间采用小区试验,设置8个施肥处理(OPT,OPT-N,OPT-P,OPT-K,CK,FP,FP-N,FP-P,FP-K),研究了施肥对玉米产量及子粒养分积累的影响,结果表明:配方施肥处理(OPT)玉米产量最高,达到11 442 kg/hm2,分别比常规施肥(FP)和对照(CK)增产3.6%和30.4%;氮、磷、钾肥对玉米产量的贡献率分别是6.18%,20.69%,12.42%,磷素是供试土壤的第一养分限制因子,其次是钾素;施用氮、磷、钾肥可明显增加玉米对养分的吸收量,提高籽粒中相应养分元素含量,在此土壤条件下应重视磷肥施用,合理配施氮、钾肥。

Eight fertilizer treatments were conducted on zhengdan 958 maize to test fetilizer effection. Grain yield and absorbable nutrient were measured in different growth period. It showed that yield of formula fertilization （OPT） in maize seedling stage and grain yield in latter period were the highest. The yield of OPT was 3.6% and 30.4% respectively higher than that of conventional treatment （FP） and CK. Incretion rate of N,P, K fertilizer was 6.18%, 20.69%, 12.42%, P was the first nutrient limiting factor, the second was K in the soil. N, P, K fertilizer increase absorbable nutrient and improve content of N, P, K element in maize seed.