渭北旱塬苹果园内外温度变化特征研究

发布时间：2018-03-24 04:19

  本文选题：渭北旱塬　切入点：苹果　出处：《干旱区地理》2016年02期

【摘要】：为研究苹果不同生长阶段果园内外温度的变化特征,利用小气候梯度自动测定系统定位观测果园冠层温度、树体温度、不同高度层的空气温度以及不同深度的土壤温度,并与对照地的温度要素对比分析。结果表明:园内外温度日变化均呈单峰趋势,冠层温度峰值出现时间与园外气温一致,空气温度与树体温度较园外延迟1~2 h。园内土壤温度10 cm最高,其它层次变化与园外一致,随深度增加而升高。园内空气温度、冠层温度、土壤温度日较差在果树生长始期最大,休眠期最小,树体温度日较差生长始期最大结果期最小。果园内外气温差在结果期最为明显最大达到3.0℃左右,园内夜间高白天低。冠层温度白天高于园外且在生长始期最显著,夜间低于园外在结果期最为明显达到15.0℃左右。树体温度与果园外温度差在生长始期最大达到7.0℃,结果期最小。生长始期和结果期园内土壤温度在12∶00~22∶00之间低于园外,而休眠期则一直高于园外。
[Abstract]:In order to study the variation characteristics of apple temperature in and out of orchard at different growth stages, the canopy temperature, tree body temperature, air temperature of different height layer and soil temperature of different depth were observed by microclimate gradient automatic measuring system. The results showed that the diurnal variation of the temperature in and out of the garden showed a single peak trend, and the peak time of the canopy temperature was the same as that of the temperature outside the garden. The air temperature and the tree temperature were delayed by 1 ~ 2 h. The soil temperature in the garden was the highest, and the change of the other layers was the same as that outside the garden. The air temperature, the canopy temperature and the diurnal difference of the soil temperature in the orchard were the largest in the beginning of the fruit tree growth, and the change of the other layers was the same as that outside the garden. The dormancy period was the minimum, and the maximum fruiting period was the minimum at the beginning of the growing stage of the daily temperature range of the tree, and the maximum temperature difference between the orchard and the orchard was about 3.0 鈩，

本文编号：1656682