不同施钾量对谷子生长及产量的影响

Effect of Potassium Fertilization on the Growth and Yield of Millet

以沧州市农林科学院选育的国审高产品种沧谷4号为试验材料,研究了不同施钾量对谷子生长及产量的影响。结果表明,谷子的株高、根重、单茎鲜重、茎秆拉力、基部3~5节长度、茎秆机械强度等指标随着施钾量的增加呈现增加的趋势;地上部的干物质积累随着施钾量的增加而增加;谷子的穗粒重随施钾量增加而提高;有效穗数随着施钾量的增加而减小的趋势;谷子的经济产量在施钾量为75kg/hm2时达最高值,之后随着施钾量的增加而呈现逐渐减小的趋势,确定谷子最佳施钾量为75kg/hm2。

Using the hign-yield spiece Canggu 4 cultivated by Cangzhou Academy of Agricultual and Foresty Sciences as materials, this experiment studied the effect of potassium fertilization on the growth and yield of millet . Results show that the plants hight, the weight of root, the weight of Single stem, stem pull ,the length of the third to the fifth of stem root and the mechanical strength of the stem go up with the increase of potassi- um fertilization. The accumulation of the dry material on the ground go up with the increase of potassium fertili- zation . Results also show that the grain weight goes up with the fertilization ;the number of productive ear first goes up and than descends . After the highest point of 75 kg/hm2 , the yield of grain went down with the increase of potassium fertilization . And the optimal rate is 75 kg/hm2.