ISSN:
1432-1319
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Cowpea and mung bean were grown on sandy loam soil under three irrigation schedules during summer dry season (May-June). Mung bean maintained higher leaf water potential, turgor potential, leaf conductance, and evapotranspiration (ET) but lower water use efficiency (WUE) than cowpea (Figs. 3, 4 a, b, 6; Table 1). Leaf water potential was linearly related to soil water potential in cowpea, but showed lack of response to soil water potential during later stages of growth in mung bean (Fig. 5). Although stomata in both species started to close at higher vapour pressure deficits, the stomatal apparatus of mung bean was more sensitive to leaf moisture stress than cowpea (Fig. 8). An increase in the frequency of irrigation resulted in higher soilplant water status (Figs. 2, 3, 4 a, b), leaf conductance (Fig. 6), number of stomata per unit leaf area (Table 3), ET (Table 1) and dry matter production (Fig. 9). However, the WUE decreased with the increase in the frequency of irrigation, except in cowpea in which maximum values were under mild stress conditions (Table 1). Soil moisture extraction decreased with the depth of soil profile. An increase in moisture stress increased the soil moisture use from deeper soil layers relatively, but not absolutely. Mung bean extracted more moisture from deeper soil layers under stress conditions than cowpea (Table 1). Cowpea used less water but produced more dry matter than mung bean (Table 1, Fig. 9).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00275037
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