Correlation analysis on nutrition status of soil and leaf nutrients for Pyrus pyrifolia cv.Hosui citrus demonstration orchard

Bearing trees of Pyrus pyrifolia cv.Hosui in the northern area of Guilin,where physiologically abnormal phenomena were very typical,were selected as the research objects to study the relationship between nutrition of leaves and soil nutrients and its dynamic change rule in different periods by mensurating mineral nutrient contents of leaves and soil in the annual growth cycle,so as to probe into the relationship between the nourishments of leaves and soil in annual growing season. The results were as follows:(1)N,P and K contents of the leaves were abundant in the whole growing season,and the variation range of P contents was the most,while that of N,K contents less,and did not reach a significant level (P0.05). (2)The soil organic matter,hydrolysis of N contents of the pear gardens were very abundant,and effective P and available K contents were generally high. Available N,P,K contents of the soil in the growth cycle reached a significant level(P0.05),and the soil organic matter content was relatively stable. (3)N contents in the leaves had a significant positive correlation with soil organic matter,hydrolysis of N,effective P,and available K content of the soil(P0.05),and P and K contents in the leaves significant negatively and positively correlated with soil hydrolysis of N respectively(P0.05),while had insignificant relationship with soil organic matter,effective P and available K contents of the soil.