NGHIÊN CỨU QUÁ TRÌNH MẤT DINH DƯỠNG DO RỬA TRÔI ĐỐI VỚI ĐẤT NÂU ĐỎ BAZAN TRONG ĐIỀU KIỆN PHÒNG THÍ NGHIỆM

Trương Hồng, Hg. Thị Thanh Hương, Ng. Đặng Minh Chánh (trang 69-75, 80)

Từ khoá:  dinh dưỡng, rửa trôi, đất nâu đỏ, bazan, phòng thí nghiệm

Summary

Study on nutrient losses process caused by the leaching in red-brown soil from basaltic materials in the lab condition

Study from 1998 to 1999. Nutrient leaching was higher at the 1^st time than the 2^nd and the 3^rd. application of chemical fertilizer has stimulated nutrients which were leached stronger than the control. Application chemical fertilizer combination with farm yard manure has limited leached nutrients. The order leached nutrients ranged N>K>Ca>Mg>C. for NPK fertilizer, potassium data calculated presented that potassium leached with larger amount comparison with nitrogen at nitrate form. Use of NPK fertilizer increases the leaching of Ca ad Mg.