XÂY DỰNG CÁC TIÊU CHUẨN PHÂN CẤP MÔI TRƯỜNG ĐẤT ĐAI PHỤC VỤ CHO PHÂN LOẠI ĐÁNH GIÁ TÀI NGUYÊN ĐẤT PHÈN TRỒNG LÚA ĐỒNG BẰNG SÔNG CỬU LONG

Võ Quang Minh¹, Mai Công Hưởng¹, Trần Kim Tính²

1 Bộ môn Tài nguyên đất đai, Khoa MôI trưởng & TNTN, Đại học Cần Thơ.

² Phòng Quản lý Khoa học, Đại học Cần Thơ.

Từ khóa: tiêu chuẩn, phân cấp, môi trường, đất, phân loại, đánh giá, tài nguyên đất, đất phèn, trồng lúa, đồng bằng sông Cửu Long

Developing soil environment grading standard applying for classification of acid sulphate soils growing rice in the Mekong Delta

Vo Quang Minh¹, Mai Cong Huong¹, Tran Kim Tinh²

SUMMARY

The aim of the studies is to: (i) Identify the major environment factors (soil, hydrology, climate and biology) which affect to growth and yield of rice on acid sulphate soils (ii) Recommend some criteria for classification of land capability. The study conducted in Go Quao, Tri Ton; Tam Nong district. The results show that the limited environmental factors for rice yields on acid sulphate soil based on field survey and soil analysis including 19 factors. In which soil fertility has 8 factors including of: acidity (A), soil salinity (E), the occurrence depth of sulfuric horizon (G), the occurrence depth of sulfidic material (F), low of total nitrogen (N), low of phosphorus (P), low of minerals (K), low of organic matter (O), structure (C); Hydrology factor consists of: less active irrigating (k), less active drainage (d), depth of inundation (n), waterlogged (g), acid sulphate water (p) and saline water (w). Climate factors consists of: drought duration (h), rainfall duration (m), temperature (t). Biological factors consists of: rice varieties (i) and occurence of pest (z). Besides, the study has developed the criteria applying for rice field classification as the basis for land resourses management and rice yield improvement.

Keyword: Resources, classification, acid sulphate soil