Response of groundnut to drought stress in different growth phases uri icon

abstract

  • The response of groundnut (Arachis hypogaea L.) cultivar Robut 33-1 to drought stress imposed at different growth phases was studied during the 1982?83 post-rainy season on a medium deep Alfisol at the ICRISAT Center, Patancheru, India. Irrigation amount was varied to three levels for the growth phases: (1) emergence to flowering, (2) emergence to pegging, (3) start of flowering to start of seed growth, and (4) emergence to maturity. Soil water extraction in treatments 1 and 2 was mostly from the surface 60 cm of soil, whereas in treatment 3 extraction from the 60?120 cm soil layer was significantly higher. Total water use varied with the growth phase and also with the intensity of drought stress within a growth phase. Stress imposed in treatment 2 resulted in increases in pod number and dry matter. Significantly higher pod and kernel yields were obtained in treatment 2. Quality of kernels was also superior in treatment 2, as shown by the improved seed weight, oil and protein contents, and the percentage of seed to pod weight. In treatment 3, low yields and a lower percentage of sound mature kernels were observed. Drought stress imposed from flowering to start of seed growth was shown to be important for both yield and quality

publication date

  • 1989
  • 1989