Effect of phosphorus and potassium on yield of Panicum maximum TD.58 in Hub-Kaphong soil series
2000
Cherapatna Vongpipatana | Wiruch Suksaran | Somsak Poatong(Department of Livestock Development, Bangkok (Thailand). Petchaburi Animal Nutrition Research Center)
This study was conducted to investigate the response of purple guinea grass (Panicum maximum TD.58) to phosphorus and potassium fertilizers on Hub-Kapong Soil Series at Petchaburi Animal Nutrition Research Center, during April 1996 to March 1999. The experimental design was 4*4 factorial in randomized complete block with 4 replications. Factor A consisted of 4 phosphorus fertilizer rates viz 0, 10, 20 and 30 kg K2O5/rai/year and factor B was 4 potassium fertilizers rates viz 0, 10, 20 and 30 kg K2O/rai/year. The result of this experiment indicated that there were interaction between phosphorus and potassium fertilizer on average drymatter yield and protein content of purple guinea grass. The application of phosphorus and potassium fertilizers at the rates 10 kg P2O5+20 kg K2O/rai and 20 kg P2O5+30 kg K2O/rai/year gave highest dry matter yields (2129.8 and 2247.9 kg/rai/year) than control treatment (958.8 kg/rai/year). The consistance of rather high protein percentage (8.8-8.9 percent) and higher net profit tended to be obtained from the two recent combinations of phosphorus and potassium fertilizer treatments. Phosphorus fertilizer application increased phosphorus calcium and ADF concentration, but reduced the concentration of potassium in purple guinea grass, where as NDF was not effected. Although application of potassium fertilizer affected potassium content of purple guinea grass, it did not effect other chemical compositions.
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