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防虫网覆盖对冀西北坝上地区甘蓝虫害防控和生长的影响
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摘要
以"春丰60"甘蓝为试材,研究了防虫网覆盖对大棚内气象因子的变化、对甘蓝虫害的防控效果以及甘蓝生长和产量的影响。结果表明:在甘蓝生长季,防虫网棚内的平均温度和平均湿度较对照分别高出0.66℃和1.55%,而网棚内的平均光照强度较对照降低6.02%,覆盖网棚为甘蓝生长创造了适宜的环境。覆盖防虫网完全阻止了菜青虫和棉铃虫对甘蓝的危害,且网棚内各时期蚜虫危害株率较对照降低幅度达82.5%~95.7%,对蚜虫的防效也显著。收获时甘蓝植株的各项生长指标均显著高于对照,且产量较对照提高9.2%。防虫网在冀西北坝上地区蔬菜生产中具有良好的开发、应用和推广前景。
Taking "Chunfeng 60 " cabbage as material,the effect of using fly net on the change of meteorological factors within a plastic greenhouse,pest control、growth and yield of cabbage were studied.The results showed that in cabbage growing season,the average temperature and humidity were increased 0.66℃ and 1.55%,respectively.But the average light intensity in fly net decreased 6.02%with control,which created the appropriate environmental conditions for cabbage.Fly net completely prevented the harm of caterpillar and cotton bollworm on cabbage.The aphid damage rate in fly net in each period of cabbage was 82.5%~95.7%lower than control,the aphid control effect in fly net was remarkable.And at harvest,the plant growth indexs of cabbage were significantly higher than control,and that the yield in fly net was 9.2%higher than control.Fly net has a good prospect of development,application and promotion in vegetable production in the northwest of hebei bashang area.
引文
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