河套地区甜菜含糖与相关因素的调查

Investigation into sugar content and relative factors of sugar beet in Hetao area

调查结果表明,甜菜收获前割擗叶子、过量施氮肥和低密度种植是影响河套地区甜菜糖分的主要因素,可降低含糖3.0～4.0锤度;其次是提前收获,可降低含糖约2.0锤度。该区有利于提高甜菜含糖的适宜保苗密度为6.7～7.5万株/hm2,种肥适宜用量为:氮30～75kg/hm2,磷60～120kg/hm2,钾22.5kg/hm2;追肥适宜用量为:氮120～180kg/hm2,磷45kg/hm2,钾60kg/hm2。同时要注意选用优良品种,它是影响甜菜含糖的内在因素。

The results of investigation showed that cutting and picking the leavies before harvest,nitrogen fertilizer excessive application and planting with sparse density were the main factors affected the sugar content of sugar beet in Hetao,which can decrease the sugar content 3.0～4.0Brix;the earlier harvest can decrease the sugar content about 2.0Brix.The optimum density was67000～75000plants/ha,and the suitable quantity of seed manure was N30～75kg /ha,P60～120kg /ha,K22.5kg/ha,the suitable quantity of top dressing was N120～180kg /ha,P45kg /ha,K60kg/ha in the area.In the same time the selection of fine sugar beet varieties must be cared,that was the internal factor affected sugar content of sugar beet.