桂北丰水梨园土壤养分与叶片营养的相关性分析

选取桂北地区有生理异常现象发生的丰水梨园,以成年结果树为研究对象,通过检测年生长周期内梨树叶片矿质营养元素、土壤养分的含量,分析不同时期梨树叶片营养元素和土壤养分含量及其动态变化规律,探讨年生长季内叶片营养与土壤养分之间的相关关系。结果表明:(1)在生长季节内,丰水梨叶片中N、P、K含量丰富;营养元素含量随时间的变化幅度均为P最大,N、K较小,但均未达到显著水平(P>0.05)。(2)梨园土壤中有机质、水解性N含量丰富,有效P、速效K含量普遍偏高;年生长周期内土壤速效N、P、K含量随时间的推移变化较大,均达显著水平(P<0.05),而有机质含量则相对稳定。(3)梨树叶片N含量与土壤有机质、水解性N、有效P、速效K含量呈显著正相关关系(P<0.05);叶片P和K含量与土壤水解性N含量分别呈显著负相关和正相关关系(P<0.05),而与土壤有机质、有效P、速效K相关关系不明显。

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 (P>0.05). (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(P<0.05),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(P<0.05),and P and K contents in the leaves significant negatively and positively correlated with soil hydrolysis of N respectively(P<0.05),while had insignificant relationship with soil organic matter,effective P and available K contents of the soil.