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水稻作为湖南省沅陵县主要粮食作物之一,常年种植一季杂交中稻面积达41万亩,其中砂壤土水稻田占28%,近11.5万亩。长期以来,农民在中稻施肥上存在着重化肥轻有机肥、重氮肥轻磷钾肥、重大量元素肥轻微量元素肥以及施肥严重过量等不合理施肥现象。随着测土配方施肥技术的推广应用,这些不合理的施肥现象逐渐得到改善,但不同质地的土壤上基追肥比例不合理的现象仍然存在,导致肥料利用率低下。因此研究砂壤
Rice, one of the main grain crops in Yuanling County, Hunan Province, covers an area of 41 million mu of hybrid rice in one season, of which sandy loam and paddy rice fields account for 28% and nearly 115,000 mu. For a long time, there are many unreasonable fertilization phenomena such as chemical fertilizer light fertilizer, diazo phosphorus fertilizer K, heavy element fertilizer slight quantity element fertilizer and excessive fertilizer application on the fertilization of middle rice. With the popularization and application of soil testing and formula fertilization techniques, these unreasonable fertilization phenomena gradually improved, but the unreasonable proportion of topsoil on different soil texture still existed, resulting in low fertilizer utilization rate. So research sand soil