柑桔冻害的数量化回归分析

Regresion Analysls of Freezing Damage in Citrus

在柑桔主产区桔树遭受严重冻害的年份，对构成立地、树体和栽培措施的２０多个因子，设置了９０个标准地进行了详细调查。应用数量化回归分析诸因子与柑桔冻害之间的关系。结果表明：１９９１年，影响柑桔冻害达极显著水平的是土层厚度、土壤质地、基肥、追肥和病虫害；达显著水平的是土壤肥力、坡向、树龄、根深和结果量。此外，地类、风势和积雪处理对柑桔冻害也有一定的影响。围绕增强树体耐寒性，发挥树体正常耐寒力等问题，提出了相应的栽培措施。

As investigation was conducted in the year with severe freezing damage of more than 20 factors related to sites, trees and culture practice on 90 standard plots in main growing areas of Citrus,By means of quantitative regression, the studies on the, relationship between factors and freezing demage in Citrus showed that the extent to which the trees were injured under the weather conditi on of 1991 was significantly influenced by earth deptb,basal manure additional manuring , insect pests and plant diseases followed by soil fertility,slope direction, tree age, deptb 0f roots and fruit quantity,In ad-dition,the site type wind scale and disposal of snow accumulation was alsorelated to the freezing damage.Culture measures were suggested。