论文部分内容阅读
沧州地区濒临渤海,气候春旱秋涝,土壤盐碱瘠薄,农业生产长期低而不稳。近些年来,由于采取综合治理措施,盐碱危害逐渐减轻。涝灾频率下降,而旱灾越来越突出。尽管增加了不少水利设施,但是也很难抗御旱灾的威胁。土壤干旱成了影响农业生产的障碍因素。目前仍有70%以上的耕地属于旱地和半旱地,产量低,是本地区的拉腿田。土壤干旱和降雨量有直接关系,但并非唯一因素。从1954—1981年的气象资料分
The Cangzhou area is on the verge of the Bohai Sea. Its climate is characterized by spring drought and autumn floods, barren soil salinity, and low and unstable agricultural production. In recent years, as a result of comprehensive control measures, salt hazards gradually reduce. The frequency of floods declines, while the drought is more pronounced. Despite the increase in many water conservancy facilities, but also difficult to resist the threat of drought. Soil drought has become an obstacle to agricultural production. At present, more than 70% of the cultivated land is still dry and semi-arid land with low yield and is a legged area in the region. Soil drought and rainfall are directly related, but not the only factor. From 1954-1981 meteorological data points