Fertility improvement of sandy soil by vetiver grass mulching and compost
2000
Nualchavee Roongtanakiat | Prapai Chairoj | Sunthorn Chookhao (Kasetsart Univ., Bangkok (Thailand). Faculty of Science. Dept. of Applied Radiation and Isotopes)
To improve the productivity and fertility of Hupkapong sandy soil, fresh vetiver grass was used in mulching and vetiver grass compost was applied in combination with chemical fertilizer. Soil fertility and productivity were evaluated from the yields of Insee 1 super sweet corn hybrid grown on the soil, and soil moisture determined using a neutron probe. The results indicated that super sweet corn hybrid gave a maximum growth and yield when it was fertilized with 75-75-75 kg N-P2O5-K2O/ha in combination with soil mulching of 31.25 t/ha of fresh vetiver grass. Reducing the application of N-chemical fertilizer and vetiver mulching by 50 percent resulted in a decrease in super sweet corn hybrid yields. This decrease, however, was not statistically significant. Mulching was found to conserve topsoil moisture and increase plant growth and production. Soil incubated with vetiver grass or its compost released approximately the same amount of a ailable-N. However, fresh vetiver grass mineralized higher levels of available-P and extractable-K than vetiver grass compost. One ton of vetiver grass yielded 1.32 kg/t, 0.24 kg/t and 6.73 kg/t of available-N, available-P and extractable-K, respectively.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Kasetsart University