摘要
为探索苏北地区沿海黏质土播种条件下晚播稻茬麦高产栽培技术,以淮麦32为试验材料,研究不同播种时期和密度配置对小麦各生育期、群体总茎蘖数、产量及产量构成的影响。结果表明:播种时期为11月15日、密度为525万株/hm^2的组合,小麦最高产量为7 917 kg/hm^2;播种时期为11月25日、密度为600万株/hm^2的组合,最高产量为7 902 kg/hm^2;播种时期为12月5日,密度范围在525万～750万株/hm^2时,产量随密度的增加而增大,以密度750万株/hm^2的小麦产量最高,最高产量为7 595 kg/hm^2。相同密度下不同播种时期的小麦穗粒数和千粒质量没有明显的变化规律,但产量表现为播种时期越早产量越高,而同播种时期的小麦穗粒数和千粒质量大致上随密度的增加而递减。因此,晚播稻茬麦在保证播种质量及基本苗的情况下,早播更利于获得高产。
The present study aimed at developing high-yielding cultivation techniques for late-sown wheat after rice grown in the inshore desalted sticky soil in northern Jiangsu Province. With Huaimai 32 as the tested wheat variety, a field experiment was carried out to determine the effects of seeding date and density on the total stem number of wheat population, grain yield, and yield components of wheat after rice during the wheat growing season between November 2016 and June 2017. The experiment involved three treatment groups with the seeding dates of November 15, November 25, and December 5; and each group consisted of four treatments with four different planting densities. As a result, in the group with the seeding date of November 15, the treatment with the planting density at 5 250 000 plants per hectare attained the highest yield of 7 917 kilogram per hectare; in the group with the seeding date of November 25, the treatment with the planting density at 6 000 000 plants per hectare achieved the highest yield of 7 902 kilogram per hectare; and in the group with the seeding date of December 5, the yield of a treatment rose with increasing the planting density from 5 250 000 to 7 500 000 plants per hectare, and the treatment with the highest planting density showed the greatest yield of 7 595 kilogram per hectare. There were no significant differences in grain number and thousand-grain weight among the treatments that had the same planting density but different sowing dates, among which, however, the earlier the seeding date was, the higher the yield was obtained. On the other hand, in treatments of each group that had the same seedingdate, grain number and thousand-grainweight declined with increasing planting density. Hence, coupled with effective sowing techniques and suitable seeding densities, early seeding is conducive to attaining a high yield of late-sown wheat.
作者
王静静
杜洪艳
孙善国
张鹏
王素霞
李东升
WANG Jing-jing;DU Hong-yan;SUN Shan-guo;ZHANG Peng;WANG Su-xia;LI Dong-sheng(Lianyungang Research Institute of Land Reclamation and Agricultural Sciences of Jiangsu Province,Lianyungang 222248,China)
出处
《大麦与谷类科学》
2018年第5期1-4,共4页
Barley and Cereal Sciences
基金
江苏农垦农业科技项目(2017-20)
关键词
播种时期
密度
稻茬麦
产量
Seeding date
Planting density
Wheat after rice
Yield and yield components
