土壤养分与板栗结实性状的逐步回归分析

Stepwise Regression Analysis on the Soil Nutrients and Fruiting Characters of Castanea mollissima

本文对三明市将乐县5个样地板栗林的结实性状和供试土壤养分进行研究,采用逐步回归分析方法探讨了土壤养分与板栗果实结实性状之间的关系,旨在找出影响板栗果实品质的主要土壤因子。结果表明,5个样地土壤养分和结实性状变异存在较大相关性,有机质、全N、水解N、全K、有效P和果高、果宽和籽粒数的差异性达到了显著相关性水平。同时,板栗的结实性状与土壤养分存在较大和较复杂的相关性,N、P、K、有机质对不同结实性状起大小不一的正负效应,速效K是影响板栗结实性状的首要指标,水解N和全N次之,有机质和全P影响较小。

This paper studied the fruiting characters of the Castanea mollissima plantations in 5 sample plots in Jiangle County, Sanming and the soil nutrients in the plots. Stepwise regression analysis was adopted to explore the correlation between the soil nutrients and the chestnut fruiting characters with the aim of finding out the major soil factors affecting chestnut fruit qualities. The results showed that there were significant correlation between the soil nutrients and the fruiting character variations, and organic matter, total nitrogen, hydrolyzable nitrogen, total potassium and available phosphorus were significantly correlated with the fruit height, fruit width and seed number in a fruit. Meanwhile, there were significant and complicated correlation between the chestnut fruiting characters and the soil nutrients and N, P, K and organic matter had mixed positive or negative effects on the fruiting characters, of which available potassium was the leading indicator, followed by hydrolyzable nitrogen and total nitrogen while organic matter and total phosphate had the least effects.