8Kozlowski T T,Winget C H.Diurnal and seasonal variation in radii of tree stems[J].Ecology,1964,45:149-155.
9Namken L N,Bartholic J F,Runkles J R.Monitoring cotton plant stem radius as an indication of water stress[J].Agronomy Journal,1969,61:891-893.
10Huck M G,Klepper B.Water relations of cotton.Ⅱ.Continuous estimates of plant water potential from stem diameter measurements[J].Agronomy Journal,1977,69:593-597.
