钾素用量对垦粘1号籽粒灌浆规律及产量的影响

Effect of potassium dosage on grains filling characteristics and the yield of Kennian No.1

试验以垦粘1号为材料,通过分析灌浆期鲜重、干重、含水率的变化,研究了钾素用量对糯玉米籽粒灌浆规律及产量的影响。结果表明,籽粒鲜重和籽粒干重呈"S"型曲线变化,可用Logistic方程定量表达,籽粒含水率变化用一元三次方程反映较好。施用钾素可以显著提高百粒鲜重和干重最大增长速率,但对最大增长速率出现的时间影响不大。钾素用量与鲜穗产量和籽粒产量可用一元二次方程反映,施用钾素可以显著提高糯玉米鲜穗产量和籽粒产量,但钾素过量不利于产量的提高。

The experiment took cultivates Kennian No.1 as the material, through the analysis of the fresh weight, the dry weight and the moisture content change, the paper has studied the effect of the potassium dosage on the waxy corn filling characteristics and the yield. The results showed that the grain fresh weight and the grain dry weight of Kennian No.1 assumed the ＂S-curve＂ change. The accumulation process of fresh and dry weight was simulated well by the Logistic equation. The content of water in seed fit the equation： Y=a＋bx＋cx^2＋dx^3. The employment of potassium might obviously enhance the maximum specific growth rate of fresh weight and the dry weight, but had little effects on the appearing time of the maximum specific growth rate.The relations of potassium dosage with fresh yield and grain yield fit the equation： Y=a＋bx＋cx^2. The potassium dosage might obviously raise the waxy corn fresh yield and the grain yield, but excessive potassium dosage wouldn＇t enhance the yield.