Identification of Nutrients Limiting Rice Seedling Growth in Soils o Northeast Thailand under Water-Limiting and Non-Limiting Conditions

摘要

Glasshouse nutrient omission trials are useful in identifying nutrient limitations for plant growth in a number of soils under the same environmental conditions. Soils of low fertility are commonly used for production of rainfed lowland rice (Oryza sativa L.), and the crop often encounters water stress. Nutrient requirements may be modified when standing water disappears from the field. Two experiments with rice seedling were conducted in a glasshouse at Ubon Rice Research Center, Thailand, to identify the nutrients which limit rice growth in soils of Northeast Thailand, and to determine whether nutrient limitations are affected by water availaiblity.