Effect of water regime on two cowpea varieties Vigna unguiculata (L. Walp.)
DOI:
https://doi.org/10.25746/ruiips.v9.i3.26204Keywords:
biomass, cowpea varieties, water regime, protein content, Vigna unguiculata (L. Walp.)Abstract
Cowpea, as a leguminous crop, has a high level of vegetable protein and the ability to adapt to different environments, namely, water stress. In 2019, a trial was installed in S. Pedro, Santarém, with the goal of evaluating the growth, yield and protein content of two cowpea varieties (V1 and V2) subject two irrigation allocations, according to with evapotranspiration (D1) and watering with 50% of the allocation of the previous treatment (D2). The two-factors trial was installed in randomized blocks, considering the variety as the main factor and the water regime as the secondary factor. The V2D2 treatment showed greater water efficiency (1,44kgMSgrain/m3). Variety V2 had the highest grain yield potential (3 269kg/ha). The yield at 12% moisture was 2 027kg/ha in V1D2, 2 782kg/ha in V1D1, 2 502 kg/ha in V2D2 and 4 037kg/ha in V2D1. V1 showed greater adaptation to the water regime with less irrigation endowment, with a greater number of pods per plant (28,7 pods/plt.) although of smaller size. The V1D2 treatment was the one with the lowest weight of one thousand grains (190g/1000 grains).
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