Study On Calcium Nutrition Of Castanea Mollissima BL

Calcium is one of the most important elements of improving the productivity and quality of fruits. In this essay, the content of calcium was analyzed by field experiment and chestnut seedling.And the influence of N and P on the content of calcium was also verified. The conclusions are as followed.First, the content of Ca,N,P,K in leaves and fruit of Chestnut were analyzed to show that: (1)Under the same use level, Fertilizing base fertilizer and spray organic Ca could promote the absorption of Ca for leaves from 11th June to 5th August; for Duanci, it is better to increase the N and P then only spray Ca from 11th June to 5th August. The analysis of variance and correlation analysis showed that Ca doesn't effect the content of basic elements in Chesnutt significantly and the content of N,P,K,Ca in leaves is negative correlation.(2) The content of P and N,K in fruit is highly significant correlation; the content of N and K in fruit is significant correlation; the content of Ca and N,P in fruit is positive correlation; And the content of Ca and K in fruit is negative correlation.Second, the results of content of basic elements and resistance of Chestnut showed that:(1) When the calcium concentration is 3mmol/L, the calcium content become the highest to all the organs. Compared with the contrast, it could improve the absorption of N,P,K for both one-year seedlings and two-year seedlings.(2) When the Calcium nitrate concentration is 4mmol/L, the content of Proline is the lowest and Soluble protein and MDA is the highest; when the Calcium nitrate concentration is 3mmol/L, the content of CAT is the highest and SOD is the lowest. (3)The morphological index and element content showed that every morphological index is positive correlation with each element except for root fresh weight, and others is negative correlation. For elements, Ca and N,K, and N and K is highly significant correlation, others are positive correlationSo, a conclusion can be drawn that base fertilizer and spray organic Ca doesn't affect much to the absorption and content of Chestnut leave in field, but has impact relatively on Chestnut; To pot and control the concentration of Ca could affect the content of basic elements in Chestnut significantly for It would affect every organ of the Chestnut for their absorption of Ca,N,P,K whether the concentration of Ca is too high or too low.