氮磷钾在甘蔗体内的积累及对产量品质的影响

Accumulation of N,P,K and Their Effects on Sugarcane Yield and Quality

在田间试验条件下,研究了氮、磷、钾不同用量(氮:0、150、300、450 kg/hm2;磷:0、75、150、225 kg/hm2;钾:150、300、450 kg/hm2)对甘蔗体内氮、磷、钾积累及对产量品质的影响。研究结果表明:甘蔗的产量与钾肥的用量呈显著的正相关,与氮和磷的用量差异不显著;甘蔗的产糖量与磷、钾的用量呈正相关,与氮肥的用量没有显著性差异;甘蔗的含糖分与氮、磷、钾肥的用量没有直接的关系;营养元素在植株中的积累量随着施肥量的增加而增加,氮在甘蔗各组织中积累比例大小依次是蔗茎、梢头和枯叶,磷在甘蔗各组织中比例大小顺序依次为蔗茎、梢头和枯叶,钾在甘蔗各组织中比例大小顺序依次为梢头、蔗茎和枯叶。

Four levels of nitrogen （N： 0, 150, 300, 450 kg/hm^2）, phosphorus （P： 0, 75, 150, 225 kg/hm^2） and potassium （K： 0, 150, 300, 450 kg/hm^2） were fertilized to sugarcane fields in order to study N, P and K accumulation in sugarcane plant and their influence on sugarcane yield and quality. The results indicated that sugarcane yield significantly increased with the increase of K, while did not influenced obviously by N and P levels. Sugar yield increased significantly with the increases of P and K levels, but did not influenced by N level. Sugar content did not change directly with the levels of N, P and K. The nutrient components in plant increased with the increase of N, P and K levels, the accumulation of N, P and K in sugarcane were in order of stalk〉tip of plant〉dull leaf for N and P while in order of tip of plant〉stalk〉dull leaf for K.