摘要
红壤丘岗坡地桔园，在施用有机肥和磷钾肥的基础上，施用不同量的氮肥后，土壤pH值随着施氮量的增加而下降，呈线性负相关（r=-0．905）。不同施氮量对柑桔产量的影响具有极显著的差异。施氮后，土壤速效氮、磷、钾和叶片氮、磷、钾含量与产量呈显著或极显著线性相关。土壤速效氮磷钾与叶片氮、磷、钾含量也呈显著或极显著的线性相关。1986—1991年6年的分析结果表明，柑桔除总酸量与施氮量呈极显著负相关（r一-0．918）外，转化糖、还原糖、维生素C与施氮量均呈线性正相关，因此，施用氮肥能提高柑桔品质。
The experiment results showed that pH of the red earth in hilly orangery was decreased with increasing amount of N applied (r =- 0.905) on the basis of the application of organic manure, P and K fertilizers. The mandarin yields varied greatly with the amounts of N applied (y= 33.02 + 12.94x+ 5.07x2- 6.04x3).After application of N the mandarin yield had a significant or conrrelation with the contents of available N, P and K in the soil and leaves. The invert sugar reducing sugar and V. C contents were linearly correlated with the amount of N applied but the total acidity was negatively cormlated with the amount of N applied (r =- 0.918).So N application could raise the quality of mandarin.Keywards: N application, Wenzhou Mandarin, Tree nutrition
出处
《土壤学报》
CAS
CSCD
北大核心
1998年第1期124-128,共5页
Acta Pedologica Sinica
关键词
氮肥
温州蜜柑
营养
产量
品质
N application,Wenzhou Mandarin,Tree nutrition
