ẢNH HƯỞNG CỦA VIỆC SỬ DỤNG PHÂN KALI ĐẾN TÌNH TRẠNG KALI CỦA ĐẤT GLÂY (GLEYSOLS) NINH BÌNH

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

Summary

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.