| ‘华宁大砂壳核桃’不同树形冠层特性与其产量的相关性研究 |
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| 引用本文： | 谭岷山,吴涛,肖良俊,张晓林,李贤忠.‘华宁大砂壳核桃’不同树形冠层特性与其产量的相关性研究[J].经济林研究,2020,38(1):162-168. |
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| 作者姓名： | 谭岷山 吴涛 肖良俊 张晓林 李贤忠 |
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| 作者单位： | 西南林业大学,云南昆明 650224;云南省林业和草原科学院,云南昆明 650201;云南省林业和草原科学院,云南昆明 650201;云南省华宁县林业局,云南华宁 652899;西南林业大学,云南昆明 650224 |
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| 摘 要： | 【目的】探索适宜的‘华宁大砂壳核桃’高产树形,从而为该品种核桃高产树形的培养和整形修剪提供参考依据和技术指导。【方法】以10年生‘华宁大砂壳核桃’树为研究对象,利用HemiView数字植物冠层分析仪测定其冠层特性参数,对比研究了该品种主干分层形、开心形和自然圆头形3种树形的树体结构、冠层特性参数和单株产量的差异性,还分析了其冠层特性与单株产量间的相关性。【结果】主干分层形的总透光比为0.207,显著低于其他两种树形(P<0.05);主干分层形的叶面积指数为1.574,显著高于其他两种树形的(P<0.05);3种树形的综合光立地系数、直射光立地系数和散射光立地系数的大小顺序均为开心形>自然圆头形>主干分层形,且开心形树形的直射光立地系数和散射光立地系数与其他两种树形间均存在显著差异(P<0.05);主干分层形树冠层截获的总辐射能相比于开心形和自然圆头形的分别增加了9.9%和9.2%,其直射辐射能分别增加了10.2%和9.7%;单株平均产量,主干分层形的为110.90 kg,显著高于其他两种树形的(P<0.05)。相关性分析结果表明:冠层总透光比、散射光立地系数与单株产量均呈显著负相关(P<0.01);叶面积指数、冠层截获的总辐射能和单株产量均呈显著正相关(P<0.01),冠层截获的直接辐射能与单株产量呈显著正相关(P<0.05)。【结论】从单株产量来看,该地区大砂壳核桃的3种整形修剪树形中,主干分层形要高于自然圆头形和开心形树形。
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| 关 键 词： | 核桃 树形 冠层特性 产量 |
Correlation between canopy characteristics and yield of‘Huaning large sand shell walnut’with different tree shapes |
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| TAN Minshan,WU Tao,XIAO Liangjun,ZHANG Xiaolin,LI Xianzhong.Correlation between canopy characteristics and yield of‘Huaning large sand shell walnut’with different tree shapes[J].Economic Forest Researches,2020,38(1):162-168. |
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| Authors: | TAN Minshan WU Tao XIAO Liangjun ZHANG Xiaolin LI Xianzhong |
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| Institution: | (Southwest Forestry University,Kunming 650224,Yunnan,China;Yunnan Academy of Forestry and Grassland,Kunming 650201,Yunnan,China;Forestry Bxireau of Huaning County,Huaning 652899,Yunnan,China) |
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| Abstract: | 【Objective】Tree shapes suitable for high yield of‘Huaning big shell walnut’was discussed,in order to provide some references for high-yield tree shape culture and pruning.【Method】Using 10-year-old‘Huaning big shell walnut’as research objects,canopy characteristic parameters were measured by HemiView digital plant canopy analyzer,differences in tree structure,canopy characteristic parameters and yield per plant of three tree shapes were compared,concluding trunk-layered shape,open center shape and natural round shape,and correlation between canopy characteristics and yield per plant was analyzed.【Result】Total transmittance of trunk-layered shape is 0.207,and significantly lower than those of other two tree shapes(P<0.05).Leaf area index of trunk-layered shape is 1.574,and significantly higher than other two tree shapes(P<0.05).Based on comprehensive light site coefficient,direct light site coefficient and scattered light site coefficient,all orders of three tree shapes are open center shape,natural round shape,trunk-layered shape.Direct and scattered light site coefficients of tree with open center shape are significantly different from those with the other two tree shapes(P<0.05).Total radiation energies intercepted by canopy with trunk-layered shape are respectively increased by 9.9%and 9.2%,compared with open center shape and natural round shape,and direct radiation energies are respectively increased by 10.2%and 9.7%.Average yield per plant with trunk-layered shape is 110.90 kg,and significantly higher than those with the other two tree shapes(P<0.05).The results of correlation analysis show that both total transmittance of canopy and scattered light site coefficient have significantly negative correlations with yield per plant(P<0.01),leaf area index and total radiation energy intercepted by canopy have significant positive correlations with yield per plant(P<0.01),and direct radiation energy intercepted by canopy has a significant positive correlation with yield per plant(P<0.05).【Conclusion】From the aspect of yield per plant,among three tree shapes,trunk-layered shape is better than natural round shape and open center shape. |
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| Keywords: | walnut tree shape canopy characteristics yield |
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