Results indicate that all PRs could increase P content significantly in straw in the unreclaimed field, total NPK removal by grain and straw and soil P content were also increased significantly.

• 试验结果表明,在未垦地上,施用磷矿粉处理水稻稻草P含量比对照显著提高,植株吸收N、P、K量、土壤含P量显著增加。