Response of short-duration pigeon pea (Cajanus cajan (L.) Millsp.) to phosphorus level and population density under post-rice rainfed condition
1994
Rajendra Sahu
Genotype ICPL 87 gave significantly higher seed yield than ICPL 84019. The higher seed yield of ICPL 87 was related to higher number of seeds per pod, higher number of pods per cluster, high percent pod set, high 100-seed weight, high dry matter yield at harvest, and larger tap root length. The application of 30 kg P/ha significantly increased seed yield of pigeon pea. Increase in seed yield due to P level was associated with the increase in leaf area index, tap root length, nodule number, N yield, P uptake, dry matter yield. Increasing further P to 60 kg/ha did not significantly increase the above parameters. Thus, 30 kg/ha appears to be optimum for short-duration pigeon pea in the experimental site. Significantly higher leaf nitrogen concentration, higher phosphorus concentration, higher clusters per plant, and higher net assimilation rate was obtained from the lowest population density (50,000/plant). The highest population density (200,000/plant) gave significantly higher leaf N yield, higher plant P uptake, higher dry matter yield, and seed yield than the two other population densities. The effect of population density x genotype interaction on the number of pods per plant, branches per plant, plant height, regrowth dry weight, nodule number per plant, dry matter yield at flowering and net assimilation rate was significant. P level x genotype interaction was significant for dry matter yield at pod formation. The P level x population density x genotype interaction effect on seed density was also significant
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