氮磷钾肥对甜高粱含糖量和子粒产量的影响  

Effects of N,P and K Fertilizers on Sugar Content and Grain Yield of Sweet Sorghum

作　　者：罗峰[1] 李子芳[1] 高建明[1] 裴忠有[1] 孙守钧[1] 

机构地区：[1]天津农学院农学系,天津300384

出　　处：《湖北农业科学》2013年第22期5459-5462,共4页Hubei Agricultural Sciences

基　　金：国家科技支撑计划项目(2007BAD42B03);天津市科技计划项目(07ZHNZNC02500);天津市农业科技成果转化与推广项目(0703040)

摘　　要：以辽甜1号甜高粱（Sorghum bicolor（L.）Moench.）品种为材料,研究了氮磷钾肥对甜高粱含糖量和子粒产量的影响。结果表明,当氮、钾肥或氮、磷肥用量固定时,甜高粱含糖量随施磷量或施钾量的递增而递增;但当磷、钾肥固定时,甜高粱含糖量随施氮量的递增表现出无规律的变化。甜高粱植株中部节位含糖量较高,两端节位含糖量较低,含糖量最高值出现在第4~7节,且甜高粱全株含糖量可用第12和13节含糖量的平均值来表示。其最优施肥方案为N 20 kg/hm2、P2O528 kg/hm2、K2O 40 kg/hm2或N20 kg/hm2、P2O540 kg/hm2、K2O 28 kg/hm2。Using sweet sorghum of Liaotian No.1（Sorghum bicolor（L.） Moench） as material, effects of N, P, and K fertiliz- ers on sugar content and grain yield of sweet sorghum were studied. The results showed that sugar content increased with in- creasing dosage of P or K fertilizer when N and K fertilizer or N and P fertilizer was applied respectively. When application of P and K fertilizer was invariable, sugar content was changeable under different levels of N fertilizer. Sugar content of mid- dle nodes was high and that of both ends was low in sweet sorghum. Sugar content of the 4th to 7th nodes was the highest among all nodes. Sugar content of the whole plant could be describled with the average sugar content of the 12th and 13th nodes. The optimal dosage of the three fertilizers was N 20 kg / hm2, P2 O5 28 kg / hm2, K2 O 40 kg / hm2or N 20 kg / hm2, P2 O5 40 kg / hm2, K2 O 28 kg / hm2.

关 键 词：氮磷钾肥 甜高粱 含糖量 子粒产量 

分 类 号：S566.5[农业科学—作物学]