三种生长调节剂对甘蔗生长和蔗糖分积累的影响

对处于伸长生长后期的两个甘蔗品种,用三种生长调节剂进行叶面喷施试验。结果表明,粤糖71/210经草甘膦处理及桂糖11经乙烯利处理后,有降低叶片含水量,减少绿叶面积的作用,表现有良好的催熟增糖效果.增糖最佳时期为:粤糖71/210经喷施草甘膦后2个月,桂糖11经喷施乙烯利后1个月,甘蔗蔗糖分分别比对照高1.45%和2.42%;PP_(333)的作用不明显。三种处理在植株株高、茎节数、节间长度、蔗产量及宿根蔗出苗数等方面,与对照无显著差别。

EFFECTS OF THREE GROWTH REGULATORS ON GROWTH AND SUCROSE ACCUMULATION IN SUGARCANE

The content of water in leaf and the area of green leaf were reduced, however,the plant maturation were accelerated and the sucrose content were increased,when the leaves of Saccharum officnarum cv.Yuetang 71/210 were sprayed with glyphosate and the Oues of S.officinarum cv.Guitang No.11 were sprayed with ethrel at late elongating stage.The optimum tim- es of sucrose content increasing were two months after the Yuetang 71/210 was sprayed with glyphosate and one month after the Guitang No.11 was sprayed With ethrel.The sucrose content was increased 1.45% in the Yuetang 71%210 and 2.42%in the Guitang No.11 more than that of centrol one.The effect of spraying PP_(333)did not show the same as abeve.In three treatments,the stalk height,humber of node,length of internode,yield of sugarcane as well as the rate of emergence in ratoon were not significantly different ftom those of contrel.