When attempting to estimate transpiration by stands of vegetation from measurements of sap flow in individual plants, users must also select an appropriate sampling strategy and scaling method.SmithD.M.AllenS.J.Journal of Experimental BotanySmith DM, Allen SJ (1996) Measurement of sap flow in ...
Figure 1. A diagrammatic representation of water flow in plants. Sap movement is driven by the losses occurring inside the leaves by evaporation (E). This decreases plant leaf potential (Ψ) relative to stem, root, and soil water potentials, causing sap to flow upward. The losses by evaporat...
An improved heat pulse method to measure low and reverse rates of sap flow in woody plants The compensation heat pulse method (CHPM) is of limited value for measuring low rates of sap flow in woody plants. Recent application of the CHPM to woody ... Burgess, S. S. O,MA Adams,NC ...
We found the most abundant flow when the puncture reaches the inner layers of the bast; deepening the puncture so as to reach the wood, causes the sap exuded to be instantly drawn in by the tensile water in the vessels. Hence the exuded sap is not driven out by root-pressure through ...
The heat balance and the heat pulse methods for measurement of sap flow in plants, were compared under conditions of variable evaporative demands in order ... Y Cohen,S Takeuchi,J Nozaka,... - 《Agronomy Journal》 被引量: 99发表: 1993年 Do short term sap flow measurements scale with lea...
The use of sap flow measurements for scheduling irrigation in olive, apple and Asian pear trees and in grapevines calculation of potential plant water use; either sap flow was measured in well-irrigated plants or we used a leaf-area based model of plant transpiration... JE Fernández,SR Green...
Transport in Plants Ascent of sap is an active transport process and can occur without transpiration; the latter merely increases the rate of water flow by generating a pressure gradient which is codirectional with the electro-osmotic flow. This approach ... M Amin - Springer US 被引量: 10发...
Investigating water transport through the xylem network in vascular plants. A review on experimental methods used to investigate sap flow underlines the necessity to better characterize the relationships between the hydraulic regul... Kim,H Koo,Park,... - 《Journal of Experimental Botany》 被引量:...
sapfluxnet-publicsapfluxnet-publicPublic A global database of sap flow in woody plants CSS91 sapfluxnetQC1sapfluxnetQC1Public R package with functions related to sapfluxnet project R6 sfn_0_1_5_correctionssfn_0_1_5_correctionsPublic Corrections for SAPFLUXNET version 0.1.5 ...
如果用sap flow测定值获 得的冠层蒸腾作为尺度扩展的转换因子, 以由∆获得 的WUE计算冠层光合速率, 虽然样品的代表性较好, 相当好. 基于gs/Anet的关系, 他们以森林冠层平均气 孔导度(gc)为上推因子, 获得的测定结果几乎不受D 的影响, 克服了由E直接计算Anet受D影响的问题[18]. Schäfer等人[8]则使用...