北缘蔗区甘蔗专用留种田栽培技术研究　Ⅱ播种密度对甘蔗总芽数影响的研究

A Study on Cultivation Techniques of Sugarcane Special Seedtuber in the North Marginal Cane-growing Region Ⅱ A study about plant density which affects total amount of sugarcane buds

本研究以湘北蔗区常规好蔗品种NCo310为材料,在1997年进行甘蔗播种密度试验,观察了甘蔗的出苗率,有效茎数,总芽数,茎粗等农艺性状.结果表明甘蔗播种密度对甘蔗的总芽数有极显著的影响,甘蔗总芽数随播种密度的增大而增多,每公顷播种芽数为200000个的处理相对于播种芽数为114285个的处理总芽数增加696552个,增加比例达41.36％。本研究进一步表明：在北缘蔗区建立甘蔗专用留种田只有加大播种密度才能够达到增加甘蔗总芽数的目的。

A study was conducted with the l ead ing variety NCo310 in Northern Hunan. In 1997 an experiment about plant dens ity was done. The agricultural properties such as buds rate, useful stems, the total of buds, Stem diameter were observed. The results show that plant density obvious[y affected the total buds: the bigger plant density,the more the total buds, The total buds of treatment with 200000 planting buds is 696552 more buds than that with 114285. The increasing rate high to 4l. 36 percent.This study shows that on1y i6creasing plant density can increase the total buds in the seed-tuber fiel d of cane-growi ng North Region.