当前春粮产量在全年三熟制产量中,表现为不稳不高,其主要原因是:播种季节不能适时,春季雨水多、倒伏、早衰、病虫害多所造成的,如杭州市1975年初步统计,在小雪左右的迟播麦面积约在30万亩左右,一般与适期播种相比要减产15％左右,再从历史上分析,那年春季4、5月份雨水多,小麦就发病重、霉根、早衰、造成减产,据统计2～3年就有一年灾。如何解决?除从育种上着手外,还应从栽培上研究它的生长规律,发挥其现有品种的丰 The current spring grain yield in the whole year three-cropping system, the performance is not stable, mainly due to: sowing season can not be timely, spring rainy, lodging, premature aging, pests and diseases caused by more, such as the initial Hangzhou City in 1975 Statistics show that the area of ​​late sowing wheat around the snow is about 300,000 mu, generally about 15% less than the sowing date. From the historical analysis, the rainy days of April and May of that year are more and the incidence of wheat is heavier , Mold root, premature aging, resulting in reduced production, according to statistics, 2 to 3 years there is a disaster. How to solve? In addition to starting from breeding, but also from the cultivation of its law of growth, to play its existing variety abundance