氮素用量对油葵氮磷钾养分吸收积累及产量的影响  

Effects of nitrogen fertilizer application on NPK accumulations and yield for oilseed sunflower

作　　者：王蓉[1] 何文寿[1] 马玉波[1] 任然[1] 赵涛[1] 

机构地区：[1]宁夏大学农学院

出　　处：《中国油料作物学报》2014年第4期494-501,共8页Chinese Journal of Oil Crop Sciences

基　　金：国家自然科学基金(31160416);国家科技支撑计划课题(2011BAD29B07-05)

摘　　要：为研究氮素对油葵植株氮磷钾养分积累和产量的影响，采用田间试验方法，在宁夏中部干旱带同心地区进行了油葵肥料试验。结果表明，在供试土壤条件下，氮磷钾养分积累均呈“S”型曲线，符合Logistic方程。施氮量在6～18kg/667m2之间时，均促进油葵对氮磷钾的吸收。其中，100kg籽粒所需N、P2O5、K2O范围分别是5．68～6．19kg、4．32～4．62kg、14．82～21．20kg，三要素（N∶P2O5∶K2O）平均比例为1∶0．76∶2．93。成熟期时，氮磷钾总积累量均是N2P2K2处理最高，分别达到47．99g/株、35．45g/株、152．30g/株。当施氮量为10．53kg/667m2时，产量达最高值221．02kg/667m2，最佳经济效应施氮量为9．54kg/667m2，最佳经济效益产量为220．48kg/667m2。To better understand the nutrition of oilseed sunflower plants,fertilizer field experiment was con-ducted at Tongxin in Ningxia to investigate the effects of N,P and K fertilizers on yield.Results showed that N fer-tilizer affected organ＇s NPK accumulation at different growth stages.The accumulations of the three elements showed S curves along with the growth,imitated by Logistic equations.In the maturity stage,100 kg seeds of sunflower were obtained under average nutrition ratio （N∶P2O5∶K2O）of 1∶0.76∶2.93.Under the N2P2K2 treatment （12kg/667m2 N,6kg/667m2 P2O5 and 4kg/667m2 K2O）,the highest total accumulations reached 47.99g/plant of N,35.45g/plant of P and 152.30g/plant of K respectively.The top yield reached 221.02kg/667m2 under 10.53 kg/667m2 of N fertilizer.The top economic yields reached 220.48kg/667m2 under 9.54kg/667m2 of N fertilizer.

关 键 词：油葵 养分 施肥量 产量 

分 类 号：S143.1[农业科学—肥料学] S565.506[农业科学—农业基础科学]