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盐城市地处黄海之滨,常年植棉面积300万亩,营养钵薄膜覆盖育苗移栽占95%,总产390万担左右,是江苏省重点产棉区。多年实践证明,培育早大壮苗,是夺取移栽棉高产优质的关键。近十年来,自然灾害频繁,在灾害性气候下如何培育棉花壮苗,探讨这一问题,对当今棉花生产十分重要。一、灾害性气候对培育壮苗的影响在塑料薄膜覆盖栽培环境条件下,制约棉花早大壮苗的主要气象因子是3月中旬至4月下旬这一时段的光照时数(据统计分析,回归方程为y=1.599+O.74x,相关系数0.645);主要栽培因素是苗床管理技术。分析我市1981～1990年3月中旬至4月底的气象资料,育苗期间的灾害性气候及其影响主要有三种类
Yancheng City is located in the Yellow Sea coast, perennial cotton area of 300 mu, nutrition Bowl film covering 95% of transplanting seedlings, the total output of about 3.9 million, is the key cotton-producing areas in Jiangsu Province. Years of practice has proved that cultivating early strong seedlings, is to seize the key to high-yielding and transplanting cotton quality. In the past ten years, the frequent natural disasters and how to cultivate strong seedlings of cotton under disastrous climate are very important issues for today’s cotton production. First, the impact of disastrous climate on nurturing strong seedlings In plastic film covered cultivation environment conditions, the main meteorological factor restricting the early strong seedling cotton is mid-March to late April this period of light hours (according to statistical analysis, The regression equation was y = 1.599 + 0.74x, the correlation coefficient was 0.645). The main cultivation factors were seedbed management techniques. Analysis of meteorological data from 1981 to mid-March to the end of April in our city, there are three main types of disastrous climate and its impact during breeding