甘蔗产量、糖分与叶片酶和激素的关系

采用3种施肥处理，研究了甘蔗产量、糖分与叶片酶的活性和激素含量的关系。在甘蔗生长过程中各处理间各类生理性状存在不同程度的差异，但以分蘖期和成熟期差异明显。在分蘖期，高产高糖的处理1的吲哚乙酸（IAA）、赤霉素（GA1／3）含量、酸性转化酶活性（AIA）、硝酸还原酶活性（NRA）较高，脱落酸（ABA）、细胞分裂素（ZRs)含量较低；在成熟期，IAA、GA1／3、ABA、ZRs含量较高，AIA、NRA较低。不同处理的各类生理性状在整个生育期都有一定的变化趋势。在分蘖期－伸长期，IAA、GA1／3是逐渐上升的，ABA略有上升，而ZRs是逐渐下降的，AIA、NRA都上升；在伸长期－成熟,4中激素都是逐渐上升，AIA、NRA都逐渐下降。此外，叶片酶活性与激素含量之间也有一定的关系。

The Relationship Among Yield, Sugar Content and Activities of Enzymes and Hormone Contents in Leaves of Sugarcane

An experiment was conducted on the relationship among yield, sugar content and enzyme activities and hormone contents in leaves of sugarcane under different fertilizations. The results showed that the physiological characters were different among treatments during different growth stages, the difference were obvious especially in tillering and maturing stage. In tillering stage, IAA, GA 1/3 contents and AIA, NRA were comparatively higher, while the contents of ABA and ZRs were relatively lower. In maturing stage, the contents of IAA, GA 1/3 , ABA and ZRs were fairly higher, while AIA and NRA were relatively lower. During tillering-elongating stage, IAA and GA 1/3 contents increased gradually, ABA content rose a little, while the content of ZRs were decreasing; AIA and NRA were increasing in the mean time. During elongating-maturing stage, the contents of all the four hormones rose gradually, while AIA and NRA descended progressively. Besides, there was a relationship between the activities of enzymes and contents of hormones.