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本文在提高稻田单产的前提下,用两种不同方法进行灌水实验,观察蚊虫孳生的影响。观察内容有用水量,水温,灌地地表温,20cm 深层土壤含水率、幼虫孳生数、蚊种、孵化率及幼虫蛹的死亡数、稻谷产量等。所观察的湿润灌溉比淹灌有大量节水,稻株黑根少,成熟后期无伏倒现象,提前15天成熟,亩产提高13.97公斤,地湿白天提高0.61—1.28℃,夜间提高0.41—1.11℃。实验田由于间断出现有水无水情况,使蚊发育受到严重影响,幼虫多在2龄幼以前阶段密度指数与对照田有明显差异,前者为2.4、后者则为17.9。
Under the premise of improving the yield of paddy fields, two different methods were used to carry out irrigation experiments to observe the effects of mosquito breeding. Observed the content of useful water, water temperature, surface temperature of irrigation, deep soil moisture 20cm, the number of larvae breeding, mosquito species, hatching rate and larval pupae deaths, rice yield and so on. Compared with flooded irrigation, there was a lot of water saving observed in the wet irrigation. The black roots of the rice plants were few and there was no phenomenon of volt fall in the late maturing stage. The plants matured 15 days earlier, with a yield increase of 13.97 kg per mu, 0.61-1.28 ° C in wet and wet days, 0.41- 1.11 ° C. Experimental field due to intermittent water and water conditions, so that the development of mosquitoes have been seriously affected, more larvae before the age of 2 years before the density index and the control field have significant differences, the former was 2.4, the latter was 17.9.