苏啤3号基本苗对群个体质量及产量的影响

为了研究不同播种密度的基本苗对苏啤3号群个体质量与产量的影响。设120万1、80万2、40万3、00万和360万/hm25个播种密度基本苗处理,通过田间试验研究基本苗与不同生育时期总苗数、单株分蘖(成穗)数、叶龄、株高、次生根条数、干物质积累量、抽穗期单茎叶面积、叶面积系数和粒叶比以及产量及其构成因素的相关性。随基本苗的增加,不同生育时期的总苗数和有效穗数增加,单株分蘖(成穗)、次生根数、单株干物质积累量、单穗粒数、千粒重等不断减少,叶龄、株高变化不明显。个体与群体有相互补充作用,当个体弱而群体强或群体强而个体弱时,都可能取得理想产量。综合考虑,基本苗为270万/hm2时,对江苏里下河地区的啤麦生产最有利。

Effect of the basic Seedling on the Potation and Individual Quality and Yield of Malting Barley Supi 3

The aim of the research was to investigate the effects of basic seedlings with different densities on the population and individual quality and yield of malting barley Supi 3.In the field experiment,5 sowing densities(120×104,180×104,240×104,300×104 and 360×104/hm2) of basic seedlings were used to study the correlations between basic seedlings and total seedling,single plant tillers,leaf age,plant height,the secondary roots and dry matter accumulation in different growth stages,leaf area of single stem,leaf area index and grain-leaf ratio in heading stage,yield and its components.With the increment of the basic seedling,total seedling and effective spikes in different growth stages were increased;single plant tillers(spikes),the secondary roots,dry matter accumulation,grains per spike were continually decreased and leaf age and plant height had no obvious change.Populations and individuals had a mutual supplement action,and the ideal yield could be reached while either individuals were weak in strong populations or populations were weak with strong individuals.Considering synthetically,it was most propitious to the malting barley production in Lixiahe area of Jiangsu province when the density of basic seedlings was 270×104/hm2.