塑料大棚盘育稻秧的适宜土类及土壤pH值效应

SUITABLE SOILS FOR TRAY-RAISING OF RICE SEEDLINGS IN PLASTIC GREENHOUSES AND SOIL pH EFFECT

塑料大棚盘育稻秧适宜土类及pH值效应的试验结果表明,盐化潮土和砂姜黑土的碳酸钙含量、缓冲容量、全盐增量和pH值均高于淋溶褐土。在华北平原石灰性土壤上,塑料大棚盘育稻秧选用淋溶褐土,用硫酸调节至pH4～5,土壤养分状况得以改善,秧苗生长壮旺,防止立枯病和盐害的效果最佳。

The test results showed that calcium carbonate content, buffer capacity, total salt increment and pH value of salinized Chao soil and Shajiang black soil were higher than those of drab luvisol. For rice cropping on calcareous soil on the North China Plain, using the seedlings raised in a plastic greenhouse in trays filled with drab luvisol whose pH was adjusted to 4—5 could improve the soil nutrient conditions, allowed the rice plants to vigorously grow, and obtained an optimum effectiveness against seedling blight and brine injury.