钾素对小麦生长发育及籽粒产量的影响

１９９３～１９９５年采取田间试验和池栽试验相结合的方法，对钾素的增产效应进行了研究。结果表明：高产条件下增施钾肥，能够增加小麦植株基部１，２节间粗度和壁厚，提高植株抗倒能力；能够提高叶面积系数，增加旗叶Ｃｈｌ含量，减少Ｏ_２~－产生，降生ＭＤＡ含量，延缓叶片衰老促进干物质积累与运转，增粒增重，从而显著增加小麦产量。但施钾量超过 １５０ｋｇ．ｈｍ~２以后其效果有所下降。

Effect of Potassium on Growth and Grain Production of Winter Wheat

The effect of potassium on increasing yield of winter wheat was studied by combination experiments of field culture and pond culture from 1993 through 1995. The result are as follows: In high yield condition, increasing the supplying amount of potassium could increase the thickness and wall thickness of basic l, 2 internode, strong ability of resistance to lodging, increase leaf area index and the amount of flag leaf chlorophyll, decrease the production of active oxygen and accumulation of malondia dehyde, retard the leaf growing old, stimulate dry matter accumulation and transportation to grain, increase the grain number per ear and 1000-grain weight, thus increase the yield significantly. But the effect begin to decrease gradually when the amount is over 150kg.hm-_2