Author(s):

Suganthi S and Raja D

Abstract: A field experiment was conducted during Kharif season of 2018-19 in farmer’s field to evaluate the supplemental irrigation in intercropped cotton under rainfed Vertisols. The experiment was laid out in strip plot design and replicated thrice. The treatments in vertical strip included SI₀ - no supplemental irrigation (rainfed), SI₁ - supplemental irrigation at vegetative stage, SI₂ - supplemental irrigation at squaring to peak flowering stage, SI₃ -supplemental irrigation at boll development stage, SI₄ - supplemental irrigation at vegetative, squaring to peak flowering and boll development stage and SI₅ - supplemental irrigation at wilting symptom appearance. The horizontal strip includes cotton alone (IC₀), cotton + blackgram (1:3) (IC₁), cotton + clusterbean (1:3) (IC₂) and cotton + coriander (1:4) (IC₃). The result of the field experiment revealed that supplemental irrigation at wilting symptom recorded higher yield and was comparable with supplemental irrigation at all the stages. Among intercropping system, cotton + blackgram (1:3) recorded higher seed cotton yield. But, cotton + clusterbean (1:3) registered significantly higher value in other parameters such as, Land Equivalent Ratio, Area Time Equivalent Ratio, Income Equivalent ratio which in turn increased cotton equivalent yield than the sole cotton.

Pages: 181-184  |  1270 Views  366 Downloads

Download (753KB)