不同灌水量下幼龄枣树茎流变化规律  

Variability of Young jujube tree sap flow under different irrigation amount

作　　者：李宏[1] 刘帮[2] 程平[1] 韩莹莹[3] 张志刚[2] 王真真[2] 武钰[3] 苗乾乾 黎欢[4] 

机构地区：[1]新疆林业科学院,新疆乌鲁木齐830000 [2]新疆农业大学林学与园艺学院,新疆乌鲁木齐830052 [3]新疆师范大学,新疆乌鲁木齐830054 [4]新疆维吾尔自治区林业厅,新疆乌鲁木齐830000

出　　处：《干旱地区农业研究》2016年第1期23-30,共8页Agricultural Research in the Arid Areas

基　　金：林业公益性行业科研专项(201304701-2)

摘　　要：探讨了不同灌水量(W1,32 L;W2,48 L;W3,64 L以及W4,80 L)对4年生幼龄枣树茎流速率变化规律的影响以及茎流速率与环境因子之间的关系,通过美国Dynamax公司生产的Flow^(-3)2包裹式茎流计进行茎流速率的测定,并在样地内安装HOBO小气候仪同步获取太阳辐射、温度、空气湿度以及风速等气象数据。结果表明:不同灌水量下,枣树茎流速率日变化趋势均为单峰形曲线,除W4外,枣树茎流速率平均值随着灌水量的增加而逐渐增大,W1、W2和W3处理的茎流速率的平均峰值分别为516.63、819.04 g·h^(-1)和974.86 g·h^(-1);枣树茎流日累积量变化过程曲线均呈现较为明显的"S"形,除W4外,随着灌水量的增加,枣树茎流日累积量增加,W1、W2、W3和W4茎流日累积量分别为4.98、7.02、9.10 L和8.63 L;不同灌水量下茎流速率与太阳辐射、温度以及风速呈正相关,且茎流速率与太阳辐射和温度相关性达到显著水平,其中与太阳辐射的相关性最高,W1、W2、W3和W4处理下相关系数分别为:0.939、0.944、0.959和0.939;而与空气湿度呈现出较明显的负相关,相关系数分别为-0.579、-0.815、-0.822和-0.730。This study aims to explore the influence of different irrigation water （W1,32 L; W2,48 L; W3, 64 L; W4,80 L） on stem flow rate of four years jujube tree, using How - 32 package type stem to determine the stem flow rate and a HOBO microclimate instrument to monitor solar radiation, temperature, air humidity and wind speed and other meteorological data. The results showed that： Under different irrigation water, jujube stern flow rate exhibited an unimodal type curve, increasing with the increase of irrigation water and showing average peak of 516.63, 819.04 g·h^-1 and 974.86 g·h^-1 for W1, W2 and W3, respectively; Cumulative dynamics of stem flow showed a clear ＂S＂ shape, with W1, W2, W3 and W4 having the value of 4.98 L and 7.02 L and 9.10 L and 8.63 L, respectively. Correlation analy- sis revealed that flow rate was positively related with the solar radiation, temperature and wind speed at significant level, the highest correlation coefficients existing with the sun＇ s radiation. By contrast, air humidity was negatively correlated with sap flow.

关 键 词：灌水量 林木井式灌溉 幼龄枣树 茎流速率 环境因子 

分 类 号：S274[农业科学—农业水土工程] S665.1[农业科学—农业工程]