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钾肥对小麦氮,磷,钾的吸收分配及产量,品质的影响
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摘要:
在安徽淮北地区对小麦进行了施用不同水平钾肥试验,结果表明:在小麦抽穗期及成熟期,各器官的含氮量与施钾水平呈极显著曲线相关,含钾量与钾水平呈极显著直线相关,而含磷量与钾水平相关不显著。施氯化钾210Kg/hm~2时,体内各器官的氮、磷、钾含量及积累量为最高。植株成熟时的积累量,N为228.75Kg/hm~2,P_2O_5为90.75Kg/hm~2,K_2O为205.95Kg/hm~2。氮、磷养分多集中于籽粒中,N占总量的52——68.9%,P_2O_5占48.1—61.6%,K_2O则以茎、穗轴中为最多,约占总量的53.4—79.8%。返青拔节期,其地上部分K/N比值≤0.56,抽穗期叶片<0.45,茎≤1时,易出现缺钾症。施钾明显提高小麦的产量以及蛋白质和淀粉含量,经曲线回归分析,小麦产量、蛋白质及淀粉含量均分别与钾水平呈极显著的曲线相关。
关键词:  钾肥 小麦 产量 品质 氮肥 磷肥
DOI:
基金项目:
Influence of K Level on Uptake Distribution, Production and Character of Wheat
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Abstract:
In this experiment the wheat were sown in the soil which were never supplied with organicmanure, and the same amount of N and P and different amount of K were applied. The resultsindicated that K level was very significantly correlated to the contents of N and K in wheat, butnot to the content of P. The highest contents and accumu lations of N, P and K were observed with the application level of KCl at 210kg/hm~2. N (52-68.9%) and P (P_2O_5 48.1-61.6%) dis-tributed mainly in seeds while K (K_2O 53.4-79.8% ) mainly in stem and stalk. The yield of wheat and the contents of protein and starch were very significantly correlatedwith K level.
Key words:  Potassium nutrition,Wheat,Nutrient uptake,Nutrient distribution,Production and Character,

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