根据土壤普查,钟山县稻田土壤的主要碍障因素是:①稻田偏碱,严重碳酸盐渍化;②土壤瘦瘠,有效养分缺乏,尤其严重缺磷、缺钾;④土壤板结,耕作层浅薄。针对这些障碍因素,该县两年来着重抓碳酸盐渍化稻田的治理和氮磷钾三要素配合,增施磷、钾肥料,并对低产田进行水旱轮作试 According to the soil census, the main obstacle factors of paddy soils in Zhongshan County are: (1) partial alkalis in paddy fields and severe carbonate infiltration; (2) soil is barren and lack of available nutrients, especially for phosphorus deficiency and potassium deficiency; (4) soil compaction and cultivation Layer shallow. In view of these obstacles, the county focused on the treatment of carbonated rice fields and the three elements of NPK in the past two years, adding phosphorus and potassium fertilizers,