Hoàng Ngọc Thuận1, Nguyễn Hữu Thành2
1Viện Thổ nhưỡng Nông hoá
2Đại học Nông nghiệp I, Hà Nội
Từ khoá: ảnh hưởng, phân, kali, đất glây, Ninh Bình
Impact of the potassium fertilizer application on the potassium status of gleysols in Ninh Binh
The content of soluble, exchangeable, nonexchangeable, and total forms of potassium was 1.9, 8.7, 41.0mg/100g soil, and 2.08%, respectively. Potassium potential of soil was 2.73. rate of potassium fixation was from 36.36 to 8.89% when the dose of potassium added to soil was from 0.11 to 1.80meK/100g soil. The content of soluble, exchangeable, nonexchangeable forms of potassium increased and potassium potential decreased when applying potassium fertilizer for rice with dose of 60kg or more K2O/ha.