| 桦树汁液流动规律的研究 |
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| 引用本文： | 王金生,朱承忠.桦树汁液流动规律的研究[J].经济林研究,1991,9(1):23-27. |
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| 作者姓名： | 王金生 朱承忠 |
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| 作者单位： | 青海农林科学院林业所
(王金生)，青海农林科学院林业所(朱承忠) |
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| 摘 要： | 系统研究了青海桦树汁液流动的发生和发展规律,确定了桦汁始流时间,持续时间、终止时间、桦汁的流汁日变化规律、最大流汁发生的时区,采用关联度分析的方法,获得地温对流汁的影响大于气温的结论;试验结果还表明产汁量与林木胸径无直接关系;由流汁日产量序列数据,建立了产量预报方程。此外,还对采汁高度、方向、孔数对流汁量的影响也做了相应试验。
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| 关 键 词： | 白桦 汁液流动规律 产汁量 采汁周期 桦树 |
SAP FLOW REGULARITY OF ASIAN WHITE BIRCH |
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| Wang Jinsheng Zhu Chengzhong.SAP FLOW REGULARITY OF ASIAN WHITE BIRCH[J].Economic Forest Researches,1991,9(1):23-27. |
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| Authors: | Wang Jinsheng Zhu Chengzhong |
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| Institution: | Forestry Research Institute of Qinghai Academy of Agriculture and Forestry |
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| Abstract: | By studying the occurrence and development regularities of sap flow of Asian white birch ( Betula platyphylla ) in Qinghai Province, we defined the sap's initial flow time, the flow duration, the flow stopping time, the regularity of daily change and the period of maximum flow. With correlation analysis we came to the conclusion that soil temperature affected the sap flow more greatly than air temperature. Our study also revealed that the tree's breast-high diameter had no direct bearing on the harvested quantity of sap.And on the basis of the daily records of sap volume obtained, we established the yield forecast formula. Finally, we tested the effects of different sapping heights, sapping positions and the number of sapping holes on the quantity of sap flow. |
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| Keywords: | Betula Platyphylla sap flow regularity quantity of sap flow cycle of sap harvest |
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