论文部分内容阅读
近年来,随着城乡人民生活水平的提高,各地市场对新鲜蔬菜的需求量不断增长。农村实行生产责任制后,广大菜农也迫切要求发展保护地蔬菜生产,增加经济收入。塑料大棚结构简单,保护面积大,增温快,保温效果好,节约能源,早熟增产。早春可较一般保护栽培蔬菜提早1月上市,秋季还可延迟30—50天供应,对于调节市场淡季,提高菜
In recent years, with the improvement of people’s living standards in urban and rural areas, the demand for fresh vegetables in various markets has been on the rise. After the implementation of the production responsibility system in rural areas, the majority of vegetable farmers also urgently demand the development of protected vegetable production and increase their economic income. Plastic greenhouse structure is simple, large protected area, warming fast, good insulation effect, energy conservation, early maturity increase. Early spring than the general protection of cultivated vegetables early January listing, the fall can also be delayed supply of 30-50 days, for regulating the off-season market, raising vegetables