秸秆带状覆盖对西北旱地小麦籽粒灌浆速率和产量的影响

为探明秸秆带状覆盖对旱地小麦(Triticum aestivum L.)增产的效果,采用秸秆带状覆盖(M)及无覆盖露地(CK)2种种植方式,其中秸秆带状覆盖设置59％(M3)、50％(M4)、40％(M5)、37％(M6)4个秸秆覆盖度,研究其对小麦小穗败育率、节间长度及株高、籽粒灌浆速率和产量的影响.结果表明,与CK...

Effects of Straw Strip Mulching on Grain-Filling Rate and Yield of Wheat in Northwest Dryland

In order to explore effect of straw strip mulching on yield increase of dryland wheat(Triticum aestivum L.),straw strip mulching(M)and open field without mulching(CK)were used to study the effect of straw strip mulching 59%(M3),50%(M4),40%(M5)and 37%(M6)on spikelet abortion rate,internode length and plant height,grain filling rate and yield of wheat.The results showed that the spikelet seed setting rate and plant height increased by 0.2%~3.3%and 1.7%~5.3%in straw strip mulching compared to CK.Except for the lower coverage of the M6,straw strip mulching significantly reduced the rate of spikelet abortion.The straw strip mulching increased the grain filling rate and prolonged the grain filling duration in the middle and late stage of wheat.Compared with CK,the straw strip mulching increased the grain filling rate at the fast and slow growth stages by 11.8%and 154.5%,respectively,and the grain weight of CK tended to be stable at 42 d after anthesis,while the straw strip mulching still increased slowly.The yield of different straw strip mulching increased by-0.8%~6.2%,and M3 obtained the highest yield,which was mainly due to the significant increase in ear number.The results of this study can provide reference for the cultivation techniques of the high and stable yield of dryland wheat.