摘要
甜菜叶丛繁茂期是前期生长中心。繁茂期叶面积与块根产量、含糖率呈强正相关（ｒ＝０．９６１６、０．９５８８）；生长期积温与块根产量亦呈强正相关（ｒ＝０．７２４２）。优化模型指出，３月底前是甜菜适宜播期；氮、磷、钾分别总投入４８４．５、１６９．０５、７５ｋｇ／ｈｍ￣２，产量达７５ｔ／ｈｍ￣２。
The stage of leaf luxuriancy was the growth center of sugar beet in the earlier stage. In this stage,leaf areas and yields of root tuber ,sugar content showed extremely positive relationshipsr=0. 9616,0. 9588).Accumulative temperatureduring growing peried and yeilds of root tuber also showed an extremely positive relationship(r=0. 7242).The optimummodel indicated that when applications of N,P,K were 484.5, 169.05 and 75 kg/hm￣2 respectively,the output of beet would be 75t/hm￣2.
出处
《西北农业学报》
CSCD
1994年第4期93-96,共4页
Acta Agriculturae Boreali-occidentalis Sinica
关键词
甜菜
叶面积系数
块根产量
生长
陕西
Sowing time of sugar beeAccumulative temperature during growing period
Coefficient of leaf area
Output of root tuber
