昆明市西山区苹果园营养诊断研究初报

为了及时了解果园的营养状况,为制定合理的施肥方案提供科学的依据,采用化学分析方法对云南省昆明市西山区大河果园苹果叶片和土壤的营养元素含量进行了分析,结果表明:果园土壤pH值偏低,土壤中阳离子交换量较低,其有机质及氮的含量较高,全磷、有效磷含量偏低,全钾含量偏低,但速效钾含量偏高,硼及土壤交换性钙、镁的营养水平较低,而锌含量能满足生产优质红富士苹果的要求。根据营养诊断分析结果提出了今后应控制氮肥施用量等建议。

Nutrient Diagnosis of Trees at an Apple Orchard in Xishan District of Kunming City

In order to know nutrient status of tree at a orchard in time and provided a scientific basis for making a reasonable fertilizing scheme,nutrient elements contents in apple leaf and soil were analyzed by chemical analysis method,which were collected from Dahe Orchard in Xishan District of Kunming City.The results showed that the pH value of soil was low;the cation exchange capacity in soil was lower than the normal;the contents of organic matters and nitrogen were higher,but the contents of total phosphorus and available phosphorus were lower in soil;the content of total potassium was low,but the content of rapid available potassium was high;the contents of boron,exchangeable calcium and magnesium were lower;the content of zinc could meet demand of producing high quality Red Fuji.Based on the results of nutrient diagnosis,some suggestions were put forward,for example,controlling nitrogen application in future.