摘要
在甘蔗分蘖期,用0(CK),100,200mg·L^(-1)3个浓度的乙烯利对中熟品种桂糖84/332、特早熟品种新台糖1号进行叶面喷施。结果表明:1.乙烯利处理后,甘蔗叶片和茎的生长表现出先受抑制后恢复的生长规律,浓度越大,受抑制程度越大。叶片生长受抑制的时间约为2～3个月,茎伸长生长受抑制的时间为15d 左右。2.乙烯利处理对甘蔗生长发育与产量的影响具有两面性;乙烯利在抑制甘蔗地上部分生长的同时促进地下蔗芽的萌发和生长;乙烯利处理使茎长有所下降,但能增加有效茎数。3.乙烯利处理对甘蔗产量、品质的影响因不同品种而异。
The plants of two sugarcane varieties,i.e.Guitang 84/332(intermediate ma- turing)and ROCl(very early muturing)were sprayed with three different concentrations of ethephon(0,100mg·L^(-1),200mg·L^(-1))at tillering stage.The results showed as follows: 1.After the treatment of ethephon,the growth of the leaves and stalks were apparently inhibited first,but then restored gradually.The higher the concentration was,the greater the inhibition showed.The inhibition duration was two to three months for leaves and about fifteen days for stalks. 2.The ethephon treatments inhibited the elogation of stalks but promoted the tillering of plants.As a result,the treatments of ethephon decreased the length of stalks but increased the millable stalks. 3.The influences of the ethephon treatments on cane yield and quality varied with differ- ent varieties.
基金
国家自然科学基金
