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山东省广北农场地处渤海沿岸,土壤系发育于黄河冲积母质的滨海潮土。历年植棉面积2,500亩,占耕地面积的5—10％,棉花产量低而不稳,一般亩产皮棉40—50斤。影响棉花产量的主要原因是低温、干旱、盐碱,每年春季地温回升缓慢,又常有倒春寒现象。加上春季多干旱风,不但影响棉花播种出苗,并常因返盐引起大量死苗,形成缺苗断垄,致使有面积无产量。秋季早霜、低温影响棉花正常成熟,每年有大量霜后花及不成熟的
Guangbei Farm in Shandong Province is located along the coast of Bohai Sea, the soil developed in the alluvial mother of the Yellow River alluvial soil. Over the years cotton area of 2,500 acres, accounting for 5-10% of the cultivated area, low and unstable cotton yield, the general mu produce 40-50 pounds of lint. The main reason for affecting cotton production is low temperature, drought, saline-alkali, annual spring temperature rise slowly, and often late spring cold phenomenon. With more dry spring wind, not only affects cotton seedling emergence, and often caused by a large number of dead seedlings returned to salt, lack of seedlings off ridge, resulting in area without yield. Early autumn frost, low temperature affect the normal maturity of cotton, flowers and immature after a large number of cream each year