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探索不同程度的风灾在不同时期对小麦生产造成的损失,为风险互助的灾害程度认定和补偿金额的确定提供参考数据。试验结果:①小麦开花后不同时期受风灾发生倒伏,均有不同程度的损失,产量损失较为严重;②受风灾时期不同,倒伏造成的损失程度随着开花天数的增加(即倒伏时间越晚)产量呈明显的增加趋势;受灾时期相同,倒伏倾角越大,产量越低,在所有受风灾的处理中,损失程度最大的是处理9(倾角>80°、开花后10d倒伏),比对照减产267.5kg/667m2,减产72.8%;处理5(倾角>60°、开花后10d倒伏)次之,比对照减产205.5kg/667m2,减产55.9%;受损失最小的是处理4(倾角>40°,开花后25d倒伏)比对照减产25.8kg/667m2,减产7.0%;③从产量构成3要素上分析,开花后倒伏对667m2穗数没有影响,对穗粒数有一定的影响,影响最大的是千粒重,总的趋势是受灾时期越早,穗粒数和千粒重越低;受灾时期相同的处理,倒伏倾角越大,穗粒数和千粒重越低。
Explore different degrees of wind damage in different periods of wheat production losses caused by the risk of mutual aid to determine the extent of the disaster and determine the amount of compensation to provide reference data. The results showed that: (1) Wheat was lodging at different periods after flowering, with different degrees of loss and serious loss of yield; (2) the degree of loss caused by lodging increased with the number of flowering days (ie, the later the lodging time) And the yield was obviously increased. During the same period of disaster, the larger the lodging dip and the lower the yield, the largest loss in all the treatments affected by the typhoon was 9 (inclination> 80 °, lodging 10d after flowering) (Inclination> 60 °, lodging 10d after flowering) followed by the yield reduction of 205.5kg / 667m2, yield reduction of 55.9%; treatment 4 (inclination> 40 °, Flowering after 25d lodging) than the control yield 25.8kg / 667m2, reducing 7.0%; ③ from the yield components of the three elements of analysis, after flowering on 667m2 spike number had no effect on the number of grains per spike, the greatest impact is the grain weight , The general trend is that the earlier the disaster period, the lower the number of grains per spike and the lower the 1000-grain weight; the same treatment during the disaster period, the larger the lodging dip, the lower the number of grains per spike and the weight of 1000-grain.