Orchard Nutritional Status Analysis Of Huangguan Pear Main Area In Hebei Central

Hebei province is one of the largest production province of the crested pear in China,especially shijiazhuang area. Orchard nutrition is the basis of the robust growth, yielddevelopment and the improvement0f the quality. Therefore, understanding the orchardtree and soil nutrition, to guide the reasonable fertilization, is of great significance toimprove the fruit yield and quality.The investigation and analysis of leaf and soil nutrient is mainly conducted in36crested pear orchard of Hebei province. For the nutrition diagnosis finding the key factorof restricting the fruit production, accordingly discussing the optimum nutrition indicatorsof producting high quality pear, in order to guide the rational application of fertilizer. Themain research results are as follows:(1) In the main crested pear producing areas of the central region in Hebeiprovince.The N、P、Ca、Mg、Cu content of pear leaves in high yield orchard and middleyield orchard were higher than in low yield orchard, The Ca content is significantly higherthan that of low production orchard. Differently, the content of Mn, Fe in high yieldorchard is below than that in middle and low yield orchard.(2) The ph value of soil in high yield orchard is close to neutral and the acidity of thesoil in low yield orchard has the trend of rising, and the soil organic matter present the rulethat high yield orchard> middle yield orchard> low yield orchard. Therefore, the pH ofsoil and the organic content play a key role to the soil fertility regulation.(3) The soil total phosphorus content in low yield of pear was significantly higherthan that of high, middle yield orchard, the content of Mg in high yield orchard issignificantly higher than that of low yield orchard、the content of effective Cu in Lowyield orchard was significantly higher than that in the high and low production orchard，Fe、Mn、Zn and B have not significant difference.(4) The relationship between the mineral nutrition element content and the soilnutrients content in leaves of crested pear is complex. Study showed that, the content ofN、Ca、Fe、Mn、B in leaves has a extremely significant positive correlation between theeffective Fe, effective Mn, effective Zn and effective B; The content of P in leaves has a significant positive correlation between the P in soil,the content of K、Mg、Cu、Znin leaves has a significant negative correlation between the K、Mg、Zn、Cu in soil.