| 暖温带马尾松茎干径向变化特征及其对环境因子的响应 |
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| 引用本文： | 师志强,章异平,罗鹏飞,竹磊,翟乐鑫,侯佳玉,徐军亮.暖温带马尾松茎干径向变化特征及其对环境因子的响应[J].西北林学院学报,2022,37(6):40-47. |
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| 作者姓名： | 师志强 章异平 罗鹏飞 竹磊 翟乐鑫 侯佳玉 徐军亮 |
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| 作者单位： | (河南科技大学 园艺与植物保护学院，河南 洛阳 471000) |
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| 摘 要： | 探究短时间（月、日）尺度上马尾松生长动态变化及其与环境因子之间的关系，为理解和预测气候变暖对马尾松生长的影响提供科学依据。从2019年6月-2020年5月，通过树干径向生长测量仪（DENDROMETER）和小型气象站，对马尾松茎干年内径向变化和同期环境数据进行连续监测。结果表明:1)马尾松茎干径向日变化呈现昼缩夜胀的基本规律，马尾松茎干半径在8:00-16:00下降到最小值，16:00至次日8:00上升到最大值，年内径向变化范围为-54.4~38.1 μm。2)马尾松月累积茎干径向变化量存在2个峰值，分别出现在6月和9月，为943.3 μm和823.6 μm。3)在非生长季（11月至次年2月），马尾松日径向变化量与土壤含水量、空气湿度、降水量存在正相关关系（P<0.05），与VPD存在负相关关系（P<0.01）。在生长季初期（3-5月），马尾松日径向变化量与空气温度、土壤温度和VPD呈极显著正相关（P<0.01），与土壤含水量呈极显著负相关。但在生长季中后期（6-10月），马尾松日径向变化量与空气温度、土壤温度和VPD的相关关系由正转负，与土壤含水量的相关关系由负转正。这种转变主要是因为生长季初期，较高的温度和土壤含水量有利于马尾松日径向变化量的增加，而生长季中后期，过高的温度和较低的土壤含水量则抑制马尾松日径向变化量的增加。研究结果有助于进一步了解暖温带马尾松树木茎干的径向变化及其对环境变化的响应特征，为判断马尾松未来的生长趋势提供科学依据。
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| 关 键 词： | 马尾松 Dendrometer 径向变化 环境因子 |
Characteristics of the Variations of Stem and Radial Growth of Pinus massoniana and Responses to Environmental Factors in Warm Temperate Zone |
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| SHI Zhi-qiang,ZHANG Yi-ping,LUO Peng-fei,ZHU Lei,ZHAI Le-xin,HOU Jia-yu,XU Jun-liang. Characteristics of the Variations of Stem and Radial Growth of Pinus massoniana and Responses to Environmental Factors in Warm Temperate Zone[J].Journal of Northwest Forestry University,2022,37(6):40-47. |
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| Authors: | SHI Zhi-qiang ZHANG Yi-ping LUO Peng-fei ZHU Lei ZHAI Le-xin HOU Jia-yu XU Jun-liang |
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| Institution: | (College of Horticulture and Plant Protection,Henan University of Science and Technology,Luoyang 471000,Henan,China) |
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| Abstract: | This study aimed to explore the growth dynamics of Pinus massoniana and the relationship with environmental factors in a short time scale (daily,monthly) to provide scientific basis for understanding and predicting the effects of climate warming on the growth of P.massoniana.Dendrometer and small-scaled meteorological station were used to record the stem radial variations of P.massoniana and environmental data from June 2019 to May 2020.The results showed that 1) Daily fluctuations in stem radial variation of P.massoniana showed a rhythm which shrunken in daytime and expanded at night.The stem radius decreased from 8:00 to 16:00 and reached the minimum values around 16:00,then increased from 16:00 to 8:00 and reached the maximum values around 8:00 in the following morning.The range of diurnal stem radial variation within a year was from -54.4 μm to 38.1 μm.2) Monthly accumulation in radial variation showed two peaks,which occurred in June (943.3 μm) and September (823.6 μm),respectively.3)In the non-growth season (November-February),the diurnal radial variation responded positively to soil water content,relative humidity and precipitation (P<0.05),whereas negatively to vapor pressure deficit (VPD) (P<0.01).In the early growth season (March-May),positive correlation were observed between the diurnal radial variation and air temperature,soil temperature and VPD (P<0.01),while it was negatively correlated with soil water content.However,the opposite results were found during the middle and late growth season (June-October).The stem diurnal radial variation was negatively related to air temperature,soil temperature and VPD,and was positively related to soil water content.These inverse environment-tree growth relationships could be explained by the facts that warm and moist conditions were beneficial to boost the radial growth in the early growth season.While in the middle and later stages of growth season,lower water availability conditions,i.e.high temperature and low soil water content,probably inhibited the radial stem increment.These results can help to understand the radial variation of P.massoniana in the warm temperate zone and its response characteristics to environmental changes,and to provide scientific basis for judging the future growth trend of P.massoniana. |
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| Keywords: | Pinus massonianaPinus massoniana Dendrometer radial variation environmental factor |
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