论文部分内容阅读
山东省渤海区位于北部沿海,东起胶莱河,西至板塘河,与河北交界,有无棣、沾化、利津、垦利、广饶、寿光、潍北、昌邑等县长达250公里,为一片黄河沿海冲积成荒洼的盐碱地带,地形平坦,面积4,057,000亩:年雨量平均544.2毫米,大部集中7—8两月占全年雨量52.6％,无霜期200天左右,初霜最早9月25日,晚霜至10月18日,终霜期最早2月7日最晚不超过4月29日,年平均气温13.4℃,一日内气温震幅亦很大。常年多
The Bohai Sea in Shandong Province is located in the northern coastal area, east of the Jiaolai River, west to Banteng River, and Hebei border with Wudi, Zhanhua, Lijin, Kenli, Guangrao, Shouguang, Weichang and Changyi counties up to 250 Km, an alluvial and salty saline alluvial area along the Yellow Sea coast with a flat terrain of 4,057,000 mu: annual rainfall average 544.2 mm, most of which concentrated in July and August accounted for 52.6% of the annual rainfall and frost-free period of about 200 days, with the earliest initial frost September 25, the night frost until October 18, the earliest frost on the earliest February 7 no more than April 29, the annual average temperature of 13.4 ℃, the temperature amplitude within a day is also great. Many years