Inoculation, nitrogen and phosphorus fertilization on peanut (Arachis hypogaea L.) with and without corn intercrop
1990
Sison, L.C. | Pava, H.M.
In the monocrop peanut, inoculation hastened flowering while nitrogen at 60 kg N level significantly reduced nodule weight. However, plant height was significantly increased at 30 and 60 kg N levels. Phosphorus fertilization up to 90 kg P2O5/ha also significantly increased dry matter yield. Significantly heavier nodules were observed in uninoculated peanut plants intercropped with corn. In contrast, a significantly higher number of pods per plant was obtained from the inoculated plants intercropped with corn. Weight of nodules were significantly reduced at 30 to 60 kg N level while flowering was also significantly delayed at 60 N level. Phosphorus fertilization greatly enhanced flowering of peanuts intercropped with corn. A significantly lower weight of nodules was also observed in peanut at 30 P2O5 level than 60 P2O5 level. In terms of number of pods per plant, shelling percentage, and seed yield, application of 30 kg P2O5/ha was more advantageous. In the corn intercrop, plant height, dry matter yield, ear length, and grain yield were significantly increased by nitrogen fertilization. Phosphorus fertilization hastened tasseling, silking, and maturity of corn. Plant height was also significantly increased by phosphorus fertilization. In peanut, monoculture was found to be superior than intercropping with corn. The additional corn yield in peanut-corn intercrop cannot compensate for the reduction in peanut yield. High grain yields in monocrop peanut can be obtained even without fertilization, provided the seeds were inoculated.
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