摘要
旨在通过对苹果树树干液流变化规律的研究,了解苹果树的冠层耗水量即田间蒸腾量的变化规律。将热扩散式茎流计安装在苹果树主干上,选取3种不同的天气状况,通过数据采集分析树干液流随时间的变化规律,以及灌后树干液流的变化规律。试验结果表明:苹果树树干液流在不同天气状况下大小排列顺序为:晴天>阴天>雨天,晴天和阴天情况下,呈"几"字单峰型曲线,雨天呈多峰曲线;在研究苹果树树干日液流随时间的变化规律发现,在6—9月期间,各月最大值的大小排列顺序为:6月>9月>7月>8月;日均值的大小排列顺序为:6月>8月>7月>9月。在研究灌后苹果树树干液流变化规律发现,不管是峰值还是日树干液流值,灌溉当天的值均为5天中最小的。试验得出的苹果树干液流变化规律,为初步研究苹果树的田间蒸腾量提供了基础数据。
Through study on the changing rule of sap flow of apple trees, the variation of water consumption of the canopy （field transpiration） is expected to be made clear. The author set TDP stem sap flow gauge on apple tree trunk, collected data under 3 different weather conditions, and studied the changing rule of trunk sap flow with time and the change rule after irrigation. Results showed that sap flow of apple tree under different weather conditions was in an order as： sunny day〉 cloudy day〉 rainy day. On sunny and cloudy days, the variation showed a single peak curve just like the shape of the Chinese character ＇ ）-L＇, while it showed a multi- peak curve on rainy days. When studying the changing rule of trunk sap flow with time, it was found that the order of the maximum value during the day from June to September was June〉 September〉 July〉 August, while the order of the average daily value was June〉 August〉 July〉 September. When studying the variation of trunk sap flow after irrigation, it was found that the value on the day irrigated was the smallest during 5 days, no matter it was peak value or daily value. The sap flow changing rule of apple trunk found in the study provided basic data for preliminary study on field transpiration of apple trees.
出处
《中国农学通报》
2015年第22期120-124,共5页
Chinese Agricultural Science Bulletin
基金
山西省科技攻关项目"黄土高原矮砧密植苹果园滴灌灌溉制度的研究"(20140311016-2)
关键词
苹果树
液流
热扩散茎流计
日变化
apple tree
sap flow
TDP stem sap flow gauge
daily variation
