施钾对花生养分吸收及生长的影响

Effect of potassium on nutrient uptake and growth of peanut

用盆栽试验和田间试验相结合，研究了土娄土施用不同量钾肥对花生不同生育时期养分吸收及生长的影响。结果表明：施用钾肥可促进花生的生长和发育，使花生产量提高了２７．６％，最高产量出现在Ｋ２Ｏ用量６７．５ｋｇ／ｈｍ２；施钾促进花生对Ｎ、Ｐ、Ｋ养分的吸收，三种养分的吸收量为Ｎ＞Ｋ＞Ｐ，但不同钾肥用量对养分的吸收影响不大；施钾使花生籽粒蛋白质和粗脂肪含量分别提高了１７．７％和１０．７４％。试验中我们还观察到，施用钾肥可显著提高花生的抗病性，而抗病性有随施钾量增加而提高的趋势。

A pot culture and field experiment were carried out to study the effect of potassium on nutrient uptake and growth of peanut in Loutu soil. The results showed that potassium could accerlate growth of peanut and increase yield by 27.6%. The highest yield occured when potassium was 67.5 K2O kg/hm2. Potassium could also increase N,P and K uptake rate in different stags, among them N>K>P,seedling phase>flowering phase>maturation stage. Rates of potassium had little effect on the nutrients uptake within test range. Potassium application could increase protein and crude fat content of shelled peanut 17.7% and 10.74% respectively. Potassium also could significantly improve the disease resistance of peanut.