| 摘要: |
| 经调查,供试34个果园的施肥量和产量变异很大。许多果园施氮肥过多,钾肥太少。经叶分析,N,P,K,Fe,Zn的平均含量依次是22. 8±2. 5 g·kg-1, 1. 4±0. 2 g·kg-1,10. 7±2. 0 g·kg-1, 225±51mg·kg-1和18. 74±12. 36mg·kg-1.K和Zn的含量低于正常值的果园数分别占35. 3%和58. 9%.多数果园N,P,K营养不平衡,营养三要素的需要顺序多是K>P>N.根据目标产量、生产单位果品需要养分量和养分平衡指数,确定了各果园的最小养分因素及其需肥量,并按养分比例法推荐了其他肥料的施用量。 |
| 关键词: 苹果营养诊断，最小养分因素，养分平衡指数，施肥方法 |
| DOI： |
| 分类号:S661.1 |
| 基金项目:杨凌科学基金资助项目 |
|
| Nuitrient Diagnosis of Apple Trees and Fertilizer Recommendation in Qianxian County |
|
Li Huitao Zhai Bingnian Li Gang Zhou Jianbin
|
| Abstract: |
| Great variations of fertilizer amounts and apple yield exist among the 34
orchards investigated.The application of N fertilizer is excessive in many or chards while
that of K fertilizer insufficient. The results of leaf analysis show that the average contents, in leaf, of N,P,K,Fe and Zn are 22. 8±2. 5 g·kg-1, 1. 4±0. 2 g·kg-1, 10. 7±2. 0 g·kg-1, 225±51 mg·kg-1, and 18. 74±12. 36 mg·kg-1 respectively. The orchards with K and Zn contents in leaf lower than normal respectively amount to 35. 3%
and 58. 9% of the total.There is animbalance among N,P and K in most orchards with
the requirement order of K>P>N.According to the target yield, the required nutrient
quality and the nutrient equilibrum indices of fruits, the amounts of minimum nutrient
factors and the required fertilizer were determined.The application amounts of other fertilizers were recommondated with the method of nutrient ratio. |
| Key words: nutrient diagnosis of apple tree,minimum nutrient factor,nutrient equilibrum index,recommendation of fertilizer method |
