广西钟山主要水稻土肥力变化浅析

Approaching to the change in fertility of major paddy fields in Guangxi

连续十年定位监测结果表明,土壤有机质、钾素养分含量逐年下降,土壤氮素、磷素养分含量则逐年上升.主要原因是有机肥和钾肥投入量少,钾肥施用比例低.钾肥施用比例与作物产量呈极显著正相关,增施钾肥和有机肥是改善水稻土肥力的主要措施.

Results from a trial for 10 years indicated that the contents of soil organic matter and K decreased with time, while soil N and P increased. This was caused by insufficient application of organic manure and K fertilizers.