灾害性倒伏对小麦粒重及产量的影响

研究了灾害性倒伏对小麦粒重及产量的影响。结果表明:灾害性倒伏导致粒重及产量的下降达极显著水平,分别比正常生长状态下降17.77%和40.00%。正常生长状态和倒伏生长状况下的粒重与产量的正相关都达极显著水平,产量下降值与粒重下降值之间的相关虽不显著,但也表现出明显的正相关关系,3种相关系数分别为 r=0.8102、r=0.8403、r=0.3366。并讨论了倒伏发生的直接和间接原因,提出了预防倒伏的具体措施。为保持小麦稳产高产提供了依据.

Influence of Calamitous Lodging on the Seed Weight and Yield of Wheat

The influence of calamitous lodging on the seed weight and yield of wheat was stud- ied.Results indicated:The decrement of seed weight and yield caused from calamitous lodging was extremenly significant,the percentage of decrease was 17. 77%and 40.00% respectively when compared with the wheat with no lodging.The positive correlation be- tween seed weight and yield achieved an extremely significant level regardless of whether or not there was any lodging.Although there was no apparent correlation between the in- crement values of yield and seed weight,they possessed the positive correlation as well. Three correlation coefficients mentioned above are r=0. 8102,r=0.8403 and r= 0.3366,respectively.The direct and indirect reasons which caused lodging were dis- cussed,and the preventive measures which could acted as a basis for wheat production were put forward.