中国农学通报2026，Vol.42Issue(2)：32-39,8.
播期、播量对成都平原地区冬小麦群体生长及产量的影响
Effects of Sowing Date and Seeding Rate on Population Growth and Yield of Winter Wheat in Chengdu Plain Area
摘要
Abstract
To investigate the effects of different sowing dates and seeding rates on the growth and yield of winter wheat in the Chengdu Plain,a two-factor split-zone experiment was adopted using the wheat variety'Chuanmai 1247'.The main plots were designed with five sowing dates(S1:November 1st,traditional sowing date;S2:November 8th;S3:November 15th;S4:November 22nd;S5:November 29th),and the subplots were set with two seeding rates(R1:225 kg/hm2,traditional seeding rate;R2:300 kg/hm2).The effects of each treatment on wheat growth period,tiller dynamics,dry matter accumulation and yield were systematically studied.The results showed that compared with traditional sowing date S1,the entire growth period of wheat under S2-S5 treatments was shortened by 4-17 days,which was mainly reflected in the shortening of the reproductive growth stage.As sowing delayed,the productive tiller percentage increased by 21.87％to 39.69％compared with S1.The number of effective spikes,dry matter accumulation at the maturity stage,and yield initially increased and subsequently decreased with sowing delayed,and all reached the maximum under S3 treatment,which increasing by 24.46％,2.40％,and 15.43％respectively,compared with S1.However,the thousand-grain weight consistently decreased with sowing delayed.Higher seeding rate(R2)led to higher tiller numbers of wheat at all growth stages but reduce the productive tiller percentage.Increasing the seeding rate under traditional sowing date(S1)reduced grain yield.Conversely,increasing the seeding rate under delayed sowing conditions could increased grain yield.In summary,delayed sowing date shortens the reproductive stage of wheat.Delay sowing appropriately(e.g,S2-S3)can increase grain yield by increasing the number of effective spikes and dry matter accumulation.Increasing seeding rate under traditional sowing date is detrimental to yield formation,whereas increasing seeding rate under delayed sowing date can stabilize or enhance yield.This study provides technical support for the high-yield cultivation of wheat following rice.关键词
小麦/播期/播量/产量/生育期/茎蘖动态/干物质积累Key words
wheat(Triticum aestivum L.)/sowing date/seeding rate/grain yield/growth period/tiller dynamics/dry matter accumulation分类
农业科技引用本文复制引用
刘思汐,黄祥庆,代廷云,孙加威,陈慧欢,高天,唐雪琴,杨玉萍,阎洪..播期、播量对成都平原地区冬小麦群体生长及产量的影响[J].中国农学通报,2026,42(2):32-39,8.基金项目
都市现代农业发展专项资金-成都市农业科技英才培育项目(51010023T000009939269). （51010023T000009939269）
