土壤水分胁迫条件下磷、钾营养的相互关系及其对小麦抗旱性的影响  

Effect of Phosphorus and Potassium Fertilization on Drought Resistance of Wheat Under Soil Water Stress Condition

作　　者：陈新平[1] 王敬国[1] 杨志福[1] 李晓林[1] 

机构地区：[1]北京农业大学植物营养系,100094

出　　处：《中国农业大学学报》1995年第S2期71-76,共6页Journal of China Agricultural University

摘　　要：通过盆栽试验研究了土壤水分胁迫条件下小麦磷、钾营养的相互关系及其对抗旱性的影响。研究表明,在缺磷缺钾土壤上,土壤水分胁迫时,施磷不仅有助于作物对磷的吸收,也改善了作物的钾营养状况,因而提高了作物的抗旱性,促进了作物生长;施钾有助于小麦对钾的吸收,而对磷的吸收没有影响,钾肥对小麦抗旱性的影响依赖于植物的磷营养水平。The effect of phosphorus and potassium fertilization on P.K nutrition and drought resis- tance of wheat plant was studied under soil water stress condition.The results showed that application of phosphorus markedly improved uptake of phosphorus and potassium of wheat on the soil low in availability of both phosphorus and potassium,and increased the drought resistance of plant and the growth of wheat. Application of potassium increased K uptake alone,but didn't increase P uptake.This suggested that the effect of potassium on the growth and drought resistance of wheat was dependent on the nutrition balance in the plant.

关 键 词：土壤水分胁迫 小麦 钾 磷 抗旱性 

分 类 号：S512.1[农业科学—作物学]