Study On The Relationship Between Leaf Main Mineral Elements And Fruit Yield And Quality Of Red Fuji Apple

Aim to the main problems of red Fuji apple cultivation that are unsteady yield, low quality, low economic benefit. In order to reveal the variety regulation of main mineral elements in leaf and the relationship of leaf mineral elements and fruit yield and quality, to establish the nutrient diagnose system of producing high-quality red Fuji apple, to guide fertilization of red Fuji apple, the relationship of main mineral elements in leaf and fruit yield and quality of red Fuji apple was studied from 2002 to 2003 in Fugangshanzhuan of Houjiazhuang country,Neiqiu county. The results were as follows:Under the soil condition of gneiss mountain area of Hebei province, there exited significant or very significant correlation between mineral elements of N, P, K, Ca, Mn, Zn in red Fuji apple leaves and fruit yield, and there hadn't significant correlation between other elements and fruit yield. There had very significant positive correlations among fruit yield and leaf N content on June 30, July 15, September 15, October 22; leaf P content on May 15 ,May 30;leaf Ca content on June 15, June 30, August 15; leaf Mg content from May 15 to July 15;leaf Mn content on May 15. There had very significant negative correlations among fruit yield and Leaf K content on June 15; leaf Mg content on September 15; leaf Mn content from the beginning of May to June 30.There exited significant or very significant correlation between mineral elements of N, Ca, Mg, Mn, Zn in red Fuji apple leaves and fruit hardness, and there hadn't significant correlation between other elements and fruit hardness. There had significant negative correlations among fruit hardness and leaf N content on May 30;leaf Mg content on October 22;leaf Mn content on May 30. There had very significant positive correlation between fruit hardness and leaf content on September 15. There had significant positive correlations among fruit hardness and leaf Mg content on May 15;leaf Mn content on August 15;leaf Zn content on July 15.There exited significant or very significant correlation between mineral elements of N, P, K, Ca, Mn, Zn in red Fuji apple leaves and contents of fruit total sugar and soluble solids, and there hadn't significant correlation between other elements and fruit total sugar content. There had significant negative correlations among fruit total sugar content and leaf Ncontent on May 1 and June 30; leaf P content on May 30; leaf Ca content on June 30; leaf Mn content on May 15 and June 30; leaf Zn content on May 15. There had significant positive correlation among fruit total sugar content and leaf K content on May June 15;leaf zinc content on June 30. There exited significant or very significant correlation between mineral elements of Mn, Zn in red Fuji apple leaves and fruit glucose content, and there hadn't significant correlation between other elements and fruit glucose content. There exited significant or very significant correlation between mineral elements of N, P, K, Ca, Mg, Mn, Zn in red Fuji apple leaves and fruit fructose content, and there hadn't significant correlation between other elements and fruit fructose content. There hadn't significant correlation between mineral elements of N, P, K, Ca, Mg, Mn, Zn and fruit sucrose content.There exited significant or very significant correlation between mineral elements of P, K, Ca, Mg in red Fuji apple leaves and fruit titratable acids content, and there hadn't significant correlation between other elements and fruit titratable acids content. There had significant positive correlation between fruit hardness and leaf content on September 15. There had significant negative correlation between fruit titratable acids and leaf P content on July 15; there had very significant negative correlation between fruit titratable acids and leaf Ca content on September 15. There had significant positive correlation among fruit titratable acids and leaf K content on May 15;leaf Mg content on May 15 and September 15. And there had very significant positive correlation between fruit titratable acids and leaf Ca...