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内蒙古巴盟黄河灌区近年来甜菜播种面积一般保持在30万亩左右,单产已突破2.5吨,总产占内蒙甜菜总产60％以上。三十多年实践证明,随着甜菜种植历史的延长,由于农家肥不足,氮素化肥大量使用后,土壤氮磷比例失调,加之甜菜重茬迎茬面积增加,甜菜病虫害日趋猖獗等原因;巴盟甜菜块根含糖分由种植初期1957——1958年的20％左右下降到目前的16—17％,严重减糖年份1981仅15.3％。巴盟灌区甜菜含糖份下降,除上述原因外,长期不
In recent years, the area of sugar beet sown in Buba Yellow River Irrigation Area in Inner Mongolia has generally remained at about 300,000 mu, and the yield per head has exceeded 2.5 tons, accounting for more than 60% of the total output of Inner Beet. More than 30 years of practice have proved that with the extension of the history of beet cultivation, due to lack of farmyard manure, nitrogen and phosphorus are imbalanced after heavy use of nitrogenous fertilizers, and the area of beet stubble continued to increase and the beet pest and disease become more and more rampant. The sugar content of sugar beet roots dropped from about 20% during the early 1957-1958 planting period to the present 16-17% and the severe sugar reduction year was only 15.3% in 1981. Beilun irrigated beet sugar content decreased, in addition to the above reasons, long-term not