施氮量和栽植密度对华苎2号产量形成及纤维品质的影响

EFFECT OF DIFFERENT NITROGIN APPLICATION AMOUNT AND PLANTED DENSITY ON FIBER COUNTS AND YIELD FORMATION OF RAMIE VARIETY HUAZHU 2

１９９３～１９９４年以华苎２号为材料，进行了４种施氮水平和３种栽植密度的试验，结果表明，在每ｈｍ￣２施纯氮０～４７２．５ｋｇ范围内，随施氮量增加，茎、叶生长加速，分蘖增多，各产量因素的构成比较协调，原麻产量增加，但纤维支数有所下降。每ｈｍ￣２产原麻２２５０ｋｇ的最佳施氮量为３７５ｋｇ氮。每ｈｍ￣２栽植密度在２２５００蔸至３７５００蔸范围内，旺长期生长速度是密植快于稀植，分蘖数、有效茎数、鲜茎重、干物重、原麻产量等是密植高于稀植，纤维品质密植优于稀植，但随着麻龄延长，密植增产效应逐渐降低。

The experiments of 4 N application levels and 3 planted densities were made from 1993 to 1994.The results showed, In the range of 0￣472.5 kg/hm2 N application levels,the growth of stem and leaf speeded up, tillers and fiber yield increased, but the fiber counts of Huazhu 2 decreased with N application content. In the range of 22500￣37500 hills per hm2, increasing density could help to raise the growth speed in the vigorous growing period, the numbers of tiller, the effective tillers, the weights of fresh stem and dry matter,and improve the fiber quality, but these effects gradually dwindled with ramie planted year long.