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Relative evaluation of water stress indicators for soybeans

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Relation http://oar.icrisat.org/5988/
 
Title Relative evaluation of water stress indicators for soybeans
 
Creator Sivakumar, M V K
Shaw, R H
 
Subject Others
 
Description Field studies were conducted during 1976 on Ida silt loam to evaluate stomatal conductance, leaf-water potential and leaf area as water stress indicators for soyabeans. Stomatal conductance and leaf water potential were measured at 2-h intervals from 0600 to 2000 h. Stomatal resistance was measured with a diffusion porometer, with stomatal conductance taken as the reciprocal of leaf resistance. Leaf-water potential was measured using a pressure chamber. Leaf area was measured with an electronic leaf-area integrator. Daily means of stomatal conductance and leaf-water potential measured several times during the growing season and rate of leaf area expansion were closely related to changes in soil-water potential. RGR of soyabeans was negatively correlated with stomatal conductance, leaf-water potential and rate of leaf-area expansion. The 3 plant measurements should prove useful in explaining water-deficit effects quantitatively under field conditions
 
Publisher American Society of Agronomy
 
Date 1978
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/5988/1/AJ_70_4_619_623_1978.pdf
Sivakumar, M V K and Shaw, R H (1978) Relative evaluation of water stress indicators for soybeans. Agronomy Journal, 70 (4). pp. 619-623. ISSN 0002-1962