不同播期对‘沪紫黑糯1号’糯玉米生长的影响

Effects of Different Sowing Dates on the Growth of‘Huziheinuo No.1’Waxy Maize

在永州地区对‘沪紫黑糯1号’进行秋植时间试验,以了解秋植‘沪紫黑糯1号’在不同时期播种的生长、产量与果穗质量情况。结果表明,在8月5日之前播种,随着播期的后移,玉米植株长势增强,株高呈增加趋势,8月5日之后播种,随着播期的后移,气温逐渐降低,株高明显降低。且随着播期的延后,气温降低,虫伤穗率呈下降趋势,7月15日、7月25日、8月5日、8月15日、8月25日播种的虫伤穗率分别为4.8%、4.5%、3.6%、3.2%和1.7%;从果穗的外观品质看,7月25日、8月5日、8月15日播种均好,8月25日播种的最差,7月15日播种的较好;产量以8月5日播种最高。总之,在永州气候条件下进行‘沪紫黑糯1号’秋季栽培,7月下旬至8月中旬播种能够达到丰产优质的效果。

The experiment of autumn planting of‘Huziheinuo No.1’in Yongzhou area was carried out to understand the growth,yield and ear quality of autumn planting‘Huziheinuo No.1’in different periods,so as to ensure the planting benefit.The results showed that when sowing before August 5,the growth of maize plant increased and the plant height increased with the backward movement of sowing date.After August 5,the temperature gradually decreased and the plant height decreased more obviously with the backward movement of sowing date.With the delay of sowing date and the decrease of temperature,the ear injury rate showed a downward trend.The sowing rates on July 15,July 25,August 5,August 15 and August 25 were 4.8%,4.5%,3.6%,3.2%and 1.7%respectively.From the appearance quality of ear,treatment on July 25,August 5 and August 15 were all good,sowing was good,treatment on August 25 was the worst,and treatment on July 15 was better.The yield of sowing on August 5 was the highest.In short,the autumn cultivation of‘Huziheinuo No.1’under the climatic conditions of Yongzhou area could achieve the effect of high yield and high quality by sowing from late July to mid August.