春油菜养分限制因子OPT试验研究

Study on OPT Nutrient Limit Factor Test of Spring Rapeseed

在互助县台子乡台子村大田进行春油菜养分限制因子OPT试验,结果表明:OPT处理产量最高,达5025kg.hm-2,OPT施肥方案即施N 125kg.hm-2,P2O575kg.hm-2,K2O 135kg.hm-2为春油菜生产的平衡施肥方法;油菜各生育期植株N、P、K含量变化现蕾期>盛花期>苗期>抽苔期>角果期,且N>K>P;由产量结果确定出P、K肥为试验地春油菜养分限制因子。

OPT field test on soil nutrient limit factors were carried out at Taizi village Taizi Town Huzhu County. The results showed that OPT treat which means applying N 125 kg · ha^-1, P20575kg· ha^-1 ,K2O 135kg· ha^-1 can achieve the highest yield 5025 kg· ha^-1, N,P and K contents in plant at every growing stages are different ：squaring period 〉 bloom 〉 seeding stage 〉 bolting period 〉 silique stage, and N 〉 K 〉 P, P and K are the limit factors for spring rape growth which was established by their yield results.