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宁陕县属秦岭高山稻区。全县稻区的最低海拔580米,最高1014米;山高沟深,日照不足,气候垂直差异大。在水稻生产上常出现两个难题:一是在春季育秧季节,气温忽冷忽热,呈波浪式的上升,常有3—5次冷空气入侵,严重地影响适时育秧,常造成烂种、烂秧;二是在8月下旬和9月上旬,常出现“秋霖”和20℃以下的低温,影响开花、授粉、灌浆,发生大量的空秕,形成“秋封不实”。针对上述问题,我们从1978年开始进行温室无土育秧试验。一、温室无土育秧的优点 1978—1980年,连续进行3年多点试验。1981年在小川公社示范58亩,1982年推广至
Ningshan Qinling Mountains is a mountainous area. The lowest elevation of 580 meters rice area, the highest 1014 meters; mountain high ditch, lack of sunshine, climate vertical differences. There are often two problems in rice production: First, in the spring season of raising seedlings, the temperature fluctuates suddenly and suddenly, showing a wave-like rise. Often there are 3-5 times of cold air intrusion, which seriously affects the timely planting of seedlings and often causes rotting, Rotten seedlings; the second is in late August and early September, often “autumn forest” and below 20 ℃ low temperature, affecting flowering, pollination, grouting, a large number of empty 秕, the formation of “Qiu Feng false.” In response to the above problems, we started in 1978 greenhouse soilless seedling test. First, the advantages of greenhouse soilless seedling 1978-1980, more than 3 years of continuous multi-point test. 1981 demonstration of 58 acres in Ogawa commune, 1982 promotion to