RESEARCH ON SUITABLE DOSAGE OF NITROGEN AND ORGANIC FERTILIZER FOR GROWING ELEPHANT GRASS ON DEGRADED SOIL NAM CAM RANH COMMUNE, KHANH HOA PROVINCE
Abstract
The study was conducted on degraded soil in Cam Thinh Tay commune, Cam Ranh city (now Nam Cam Ranh commune), Khanh Hoa province to evaluate the effects of nitrogen and organic fertilizer doses on the growth and yield of elephant grass grown on degraded land. The experiment was arranged in a completely randomized block design with 6 treatments and 3 replications. The results showed that the most suitable nitrogen and organic fertilizer levels in the degraded soil conditions in Cam Thinh Tay commune, Cam Ranh city (now Nam Cam Ranh commune), Khanh Hoa province were base fertilizer (60 kg P2O5 + 180 kg K2O/ha) + 300 kg N + 25 tons of organic fertilizer/ha. With this fertilizer level, the green matter yield reached 278.1 tons/ha/year, the profit was 33,050,000 VND/ha/year and the marginal cost-benefit ratio (MCBR) was high, compared to control 1 at 2.6 and control 2 at 3.4.
