| 李宏,刘帮,李长城,孙明森,刁凯,韩莹莹,程平,张志刚,王真真,武钰,苗乾乾.不同生育期幼龄枣树茎流特征及其与环境因子的关系[J].干旱地区农业研究,2016,34(5):54~61 |
| 不同生育期幼龄枣树茎流特征及其与环境因子的关系 |
| Characteristics of stem flow of young jujube tree at different reproductive periods and their relationship with environmental factors |
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| DOI：10.7606/j.issn.1000-7601.2016.05.08 |
| 中文关键词: 阿克苏地区 枣 生育期 茎流速率 环境因子 |
| 英文关键词:Aksu area Chinese jujube growth period stem flow rate environmental factors |
| 基金项目:林业公益性行业科研专项（201304701-2） |
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| 中文摘要: |
| 采用包裹式茎流计对位于新疆阿克苏地区温宿县新疆林科院佳木试验站内的幼龄枣树茎流速率进行连续测定，并同步监测样地内太阳辐射、温度、空气湿度以及风速4个环境因子，研究不同生育期枣树茎流特征及其与环境变化的关系。结果表明：①夜间均存在茎流活动，茎流速率变化曲线除果实膨大期为双峰外，其余生育期内均为单峰；②日累积量变化过程曲线均为“S”形，日均耗水量和总耗水量的趋势均为先增大后减小，且差异性明显，萌芽展叶期最低，果实膨大期最大，日均耗水量分别为2.78 L和8.31 L，总耗水量分别为83.39 L和249.30 L；③茎流速率曲线与太阳辐射和温度曲线波形变化趋势基本一致，与空气湿度曲线波形变化趋势相反，茎流速率与环境因子进行偏相关分析，影响枣树茎流速率的主要因子有所差异，但太阳辐射偏相关系数最高，按生育期顺次分别为0.767、0.762、0.873、0.838、0.603和0.825，利用多元线性回归对不同生育期枣树茎流速率与环境因子进行逐步回归，经过回归系数和相关系数检验，各多元线性回归方程均达到了显著水平。 |
| 英文摘要: |
| A package type stem flow meter for continuous measurement of young jujube tree stem flow rate was adopted to allow synchronous monitoring four environmental factors including solar radiation, temperature, air humidity and wind speed. Stem flow characteristics of Chinese jujube at different development stages were investigated and their relationship with environment variations was also analyzed. The results showed that stem flow was active at night. Except for the stem the flow rate curve W4 that exhibited a bimodal at the fruit enlargement stage, the rest were single peak during the growth period. In addition, the cumulative amount of change in Japan curves was in an “S” shape. The average daily water consumption amount and the total water consumption were both increased firstly, and then went decreased, exhibiting marked differences. The difference was the lowest at the budding and leaf expanding stage W1, and reached the highest at the fruit enlargement period W4. The average daily water consumption amounts were 2.78 L and 8.31 L, respectively, and the total water consumption amounts were 83.39 L and 249.30 L, respectively. Furthermore, stem flow rate curve, solar radiation and temperature curve waveforms displayed almost the same varying trends, different from those of the air humidity curve waveform change trend. The partial correlation analysis between stem flow rate and environmental factors indicated that the main factors affecting the jujube tree stem flow rate varied, but the partial correlation coefficients between the highest solar radiation and the progressive growth periods were 0.767, 0.762, 0.873, 0.838, 0.603 and 0.825, respectively. By employing a multiple linear regression to study stem flow rate of Chinese jujube at different reproductive periods and environmental factors for stepwise regression, with the regression coefficient and correlation coefficient tests, the multiple linear regression equation had reached a significant level. |
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