核桃土壤养分评价及其与核桃产量的相关性分析

【目的】评价新疆叶城县核桃土壤养分有效性,研究其与核桃产量的相关性,分析限制核桃产量养分因子。【方法】在叶城县核桃园采集土壤测定有机质、速效氮、速效磷、速效钾、pH和可溶性总盐,进行土壤养分分级,分析各种养分与核桃产量的相关关系。【结果】有机质、速效氮、速效磷都属于中低水平,速效钾属于中等水平,69.7%的土壤pH大于8.5,98.6%的土壤可溶性总盐<2.0 g/kg。有机质、速效钾对核桃产量没有显著影响,速效氮>90 mg/kg时核桃增产13.1%,速效磷>20 mg/kg时核桃增产11.4%,pH>8.5时核桃减产17.1%,可溶性总盐>2.0g/kg时核桃减产15.0%。【结论】叶城县核桃土壤整体处于中低水平,pH值和可溶性总盐对核桃产量影响最大,其次是速效氮和速效磷。

Evaluation of Walnut Soil Nutrients and the Correlation with Its Yield

【Objective】 This project aims to evaluate the nutrient availability of walnut soil in Yecheng County, analyze its correlation with the walnut yield and clarify the nutrient factors that limit the yield. 【Method】Soil organic matter, available nitrogen, available phosphorus, available potassium, pH and total soluble salt were collected from walnut orchard in Yecheng County, and soil nutrient classification was carried out to analyze the correlation between various nutrients and walnut yield. 【Result】Organic matter, available nitrogen and available phosphorus all belonged to the middle and low levels. Available potassium belonged to the middle level. 69.7% of the soil pH was greater than 8.5, and 98.6% of the total soluble salt of the soil was less than 2.0 g/kg. Organic matter and available potassium had no significant effect on walnut yield. When available nitrogen was > 90 mg/kg, the yield of walnut increased by 13.1%. When the available phosphorus was > 20 mg/kg, the yield of walnut increased by 11.4%. When the pH was > 8.5, the yield of walnut decreased by 17.1%. And when total soluble salt was > 2.0 g/kg, the yield of walnuts was reduced by 15.0%. 【Conclusion】The walnut soil in Yecheng County was at a medium-low level. The pH value and total soluble salt had the greatest impact on walnut yield, followed by available nitrogen and available phosphorus