配方施肥对成熟期谷子氮磷钾吸收及产量的影响

以衡200131谷子品种为试材,研究了配方施肥对谷子成熟期干物重积累、产量以及植株全N、P2O5和K2O含量的影响。结果表明：（1）配方施肥对谷子成熟期的植株干物重影响不大,而谷子植株干物重与产量相关性不明显,但秸秆干物重与穗粒干物重具有很强的相关性。（2）配方施肥处理中,仅处理13、处理9和处理2较对照增产,增产率分别为12.51%、2.23%和0.68%;其他处理均较对照减产,其中处理5、处理10和处理7减产幅度较大,减产率分别为18.53%、10.89%和9.06%。（3）谷子成熟期,秸秆和籽粒中的全氮、全磷、全钾含量比例不同,表现为各处理的全氮、全钾含量基本是秸秆高于籽粒,全磷含量则是籽粒高于秸秆。（4）不同施肥处理对谷子穗重、穗粒重、出谷率和千粒重影响不大。

Effects of Formula Fertilization on the Uptakes of Nitrogen, Phosphorus and Potassium at Maturity and Yield of Millet

The effects of formula fertilization on the dry matter weight at harvest stage,yield and N,P2O5 and K2O contents of millet were studied.The results showed that the effect on the dry matter weight was little.The correlation between dry matter weight and yield was not obvious,while that of dry matter weight between stem and ear grain was strong.The yield of treatment 13,9 and 2 increased by 12.51%,2.23% and 0.68%,respectively,that of other treatments decreased,and that of treatment 5,10 and 7 decreased by 18.53%,10.89% and 9.06%,respectively.The contents of total N and K in stem were higher than those in grain,and the content of total P was higher in grain higher than that in straw at harvest stage.The effects of different formula fertilization on the ear weight,grain weight per ear,grain percentage and 1 000-grain weight were little.