Title: Regulating Effect of Delayed Sowing Date on Yield Formation and Grain Quality of Winter Wheat
Abstract:In order to further clear the regulating effect of sowing date on grain yield and quality of winter wheat in Jidong area,two representative wheat cultivars of Lunxuan 987(LX987) and Jingdong 8(JD8) we...In order to further clear the regulating effect of sowing date on grain yield and quality of winter wheat in Jidong area,two representative wheat cultivars of Lunxuan 987(LX987) and Jingdong 8(JD8) were selected,and three sowing dates(Oct.5,10 and 15) were designed to study the effects of delayed sowing dates on dynamic changes of population size and dry matter accumulation,yield and its composition,and grain quality under field conditions.The results showed that the number of tillers per plant before winter significantly decreased,but spring tillers greatly increased and easily developed to spikes,so that tiller survival rates enhanced when sowing dates were postponed under the conditions of this study.Effects of sowing dates on the dynamic changes of dry matter accumulation per plant varied with wheat genotypes.Wheat yield components were unfavorably changed when sowing dates were postponed,so the grain yield decreased.The sowing time that the yield of JD8 was significantly reduced was earlier than that of LX987.Delayed sowing date reduced starch content of wheat grain,improved protein content of wheat grain,and changed their components as well in this study.Therefore,LX987 was selected,and it should be sowed early(Oct.5) for higher yield in Jidong area.The sowing date of LX987 might be postponed to Oct.10 to meet for the requirement of local wheat-maize double cropping system,as it might decline wheat grain yield,but improve quality.At the same time,field management had to be strengthened to avoid a big kernel weight decline for delayed sowing wheat stand.Read More
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 2
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