四川农业大学学报 ›› 2003, Vol. 21 ›› Issue (01): 1-5.doi: 10.16036/j.issn.1000-2650.2003.01.001

• 研究论文 •    下一篇

播种密度对“协调型”小麦新品种川农18的产量效应

谭飞泉, 任正隆   

  1. 四川农业大学 植物遗传育种省级重点实验室, 四川 雅安 625014
  • 收稿日期:2003-02-25 出版日期:2003-03-31 发布日期:2017-03-06
  • 基金资助:
    国家自然科学基金项目(30170579);四川省作物育种攻关计划资助项目。

Effect of Sowing Quantity on Population Structure and Yield of the "Coordination-Type" Wheat Cultivar Chuan-Nong 18

TAN Fei-quan, REN Zheng-long   

  1. State Key Laboratory of Plant Genetics and Breeding, Sichuan Agricultural University, Yaan 625014, Sichuan, China
  • Received:2003-02-25 Online:2003-03-31 Published:2017-03-06

摘要: 经过两年的试验表明:小麦新品种"川农18"在高产栽培中,产量潜力比川麦28更高,增产的主要原因是单位面积的有效穗突破了四川现有品种的上限,致使生物产量较高。川农18单位面积有效穗较高的原因,除了较强的分蘖能力外,主要在于它有更高的分蘖成穗率。本研究指出,不同的播种密度对川农18最高苗影响较大,对成穗数和叶面积指数有所影响,但对产量影响不大。与对照相比,川农18有较强的群体协调能力,在不同的播种密度情况下,均比对照的田间群体结构好,叶面积系数合理,剑叶质量较好,倒伏较少,穗数和穗重的互补能力强,更容易发挥高产潜力。川农18的分蘖力强,成穗率高,单穗重和单株生产潜力高的特点满足了现代"小麦精密播种栽培技术"对品种特性的要求,有利于在我国南方麦区建立新的小麦栽培模式。作者建议:在川农18高产栽培中,可根据实际情况,适当减少播种量(50~100kg/hm2),以充分利用分蘖成穗达到高产稳产、节支增收的目的。

关键词: 小麦育种, 播种密度, 产量, 栽培技术

Abstract: A new wheat cultivar,Chuan Nong 18(CN 18),which was developed by us,displays a higher yield potential than other old cultivars in South west China.In the South west wheat zone of China the winter is warmer and moister,and the spring is more cloudy than other wheat zones in China.Most of wheat cultivars in South west China possess commonly large spike and big flag leaf with relaxed plant type.In cultivation for high yield using these old cultivars,the big sowing quantity is used commonly and it is a usual population structure in field with a larger spike weight and fewer spike number per unit area.Compared with those old cultivars in South west China,this new cultivar CN 18 in cultivation of high yield possessed a tight plant type with significantly more spike numbers per unit area,but similar kernel weight per spike and smaller flag leaves.We named this cultivar as "coordination type".In this experiment it was found that the different sowing quantities in cultivation of high yield effected significantly the numbers of seedlings,total tillerings,and leaf area index,but not significant on spike numbers per unit area and kernel yield for "coordination type" wheat cultivar "CN 18".More reasonable population structure,suitable leaf area index,and high quality of flag leaves were formed for the cultivar CN 18 than for other old cultivars in the trial with different sowing quantities.But better population structure and higher yield were observed for cultivar CN 18 in the lower sowing quantity trial.According to these results in this study a new process with precision sowing was designed for super high yield cultivation of wheat with "coordination type cultivars" in the area of South west China.

Key words: wheat breeding, sowing quantity, yield, cultivation

中图分类号: 

  • S512.1