Study on yields and quality of tropical pasture grass and legume species: effects of phosphorus supply and cutting intervals on the growth of two tropical pasture legumes
Sanan Chantkam | Suwapong Swasdiphanich (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Agronomy)
The results indicated that siratro and common centro did not respond to the applied phosphorus in terms of cumulative dry matter yield of tops, roots, nodule number and crop growth rate. However, the optimum rates of applied phosphorus for the growth of siratro and common centro ranged from 8-20 ppm P. Cumulative yield of tops, roots, nodule number, crop growth rates and cumulative leaf areas of both siratro and common centro were significantly affected by the cutting intervals and non defoliated control plants. In contrast, common centro cut at 2 week-interval, gave the highest cumulative dry matter yield of tops. Furthermore, frequent cutting e.g. 2 week-interval, greatly reduced root growth of these two legume species when compared to the infrequent cuttings and non defoliated control plants.
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