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.