论文部分内容阅读
南方栽植葡萄为什么病害严重?因为葡萄原产黑海,地中海沿岸大沙漠地带,具有喜温、喜光、喜干燥空气的特性。因沙漠地的地下水位低,土层疏松通气,葡萄植株可形成强大的根系。因此,葡萄要求年雨量600毫米～800毫米,地势高燥,光照充足,土壤疏松深厚肥沃、保水性强、排水良好,生长发育才能顺利进行。我国南方高温多雨,空气湿度大,土壤容易板结渍水,通气不良,适宜病害的大发生和流行。如花期阴雨潮湿,影响授粉受精,阻碍子房发育,引起落花落果;7月～10月果实生长期,连绵
Why is the grapes planted in the south seriously? Because the grapes are native to the Black Sea and the deserts of the Mediterranean coast, they have the characteristics of hi-temperature, hi-light and hi-dry air. Due to the low groundwater level in the desert and the loose aeration of the soil, the grape plants can form a strong root system. Therefore, the grapes require annual rainfall of 600 mm ~ 800 mm, high terrain, adequate light, loose and fertile soil, strong water retention, good drainage, growth and development can proceed smoothly. China’s southern high temperature and rainy, air humidity, soil easily plagued with water, poor ventilation, suitable for the occurrence of disease and epidemic. If the flowering rainy and humid, affecting pollination and fertilization, obstruct the development of ovary, causing drop flowers; July to October fruit growth period, continuous