钾肥施用量对糜子产量 农艺性状及倒伏性状的影响

The Effects of Different Amounts of Potash Fertilizer on Yield,Agronomic Traits and Lodging of Broomcorn Millet

为明确糜子栽培中钾肥的最佳施用量,以糜子品种赤黍1号为试材,设钾肥施用量0(不施,CK)、60、120、180、240和300 kg/hm2计6个处理,采用随机区组试验设计,调查了不同施钾量对糜子产量、农艺性状和倒伏性状的影响。结果表明:在赤黍1号上施用钾肥,有利于提高籽粒产量,其中施钾量为120 kg/hm2时产量最高;对株高、穗长和节数影响不显著,对茎粗和分蘖数的影响达到了极显著水平,对单丛穗粒重的影响达到了显著水平;能够有效降低倒伏率和倒伏角度,施钾量为120 kg/hm2时倒伏率和倒伏角度均最小。施钾量为120 kg/hm2时能够同时提高赤黍1号的籽粒产量和抗倒能力,赤黍1号栽培中理想的施钾量为120 kg/hm2。

In order to find the optimum amount of potash on broomcorn millet , using Chishu No.1 as the test material, the amounts of potash fertilizer including 0 （not applied, CK）, 60, 120, 180, 240 and 300 kg/hm2 were set, and the effects of different amounts of potash fertilizer on yield , agronomic traits and lodging of broomcorn millet were investigated by randomized block design.The results showed that the yield of Chishu No.1 was improved by application of potassium fertilizer, and the yield reached the highest when the potash fertilizer was 120 kg/hm2.There were no significant differences of application of potassium fertilizer on plant height , spike length and node number, and the effects on stem diameter and tiller number reached very significant level , and the effect on single panicle weight was significant different.Application of potassium fertilizer could effectively reduce the lodging rate and lodging angle, and they were minimum when the potash fertilizer was 120 kg/hm2.Therefore, the potash fertilizer of 20 kg/hm2 not only increase the production, but also help to increase lodging resistance, it was the suitable fertilizer treatment for Chishu No.1.