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无产阶级文化大革命以来,经过批林整风和批林批孔运动,农业耕作制度改革的群众运动蓬勃发展,长江中下游双季稻面积逐年扩大,复种指数不断提高,有力地促进了农业生产的发展。但是,由于不利的气象条件的影响,有些地区双季稻产量低而不稳。因此,我们针对其中的几个农业气象问题作一初步分析,供参考。一、双季稻不同品种的种植界限水稻对热量的要求常以活动积温来表示。我们首先计算了双季稻主要品种所需大于10℃的活动积温(见表1),然后对南起湖南长沙到河南安阳、西由陕西西安东至上海的38个点计算了这一广大地区的有效
Since the Great Proletarian Cultural Revolution, the mass movement of reforming agricultural farming system has been booming since the campaign of rectifying forests and criticizing Lin and criticizing Confucius, the area of double-cropping rice in the middle and lower reaches of the Yangtze River has been expanding year by year, and the index of multiple cropping has been continuously raised, effectively boosting the development of agricultural production . However, due to unfavorable weather conditions, the yield of double-crop rice in some areas is low and unstable. Therefore, we make a preliminary analysis of some of the agricultural meteorological problems for your reference. First, the double cropping rice varieties of different planting limits Rice requirements for calories often activity accumulated temperature to represent. We first calculate the active accumulated temperature (see Table 1) for the major varieties of double cropping rice that is greater than 10 ° C, and then calculated the area from Changsha, Hunan, to Anyang, Henan Province, and from the Xi’an, Shaanxi Province to Shanghai, Effective