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在连续少免耕１１年的定位试验田里，研究了少免耕土壤的供肥特性和水稻吸肥规律。结果表明：（１）少免耕有利于土壤有机质、全氮和速效钾等在上层富集和积累，耕翻有利于氮素的矿化，提高前拥有效氮的供应，后期则较低；（２）连续少免耕植株含氮率前期较高，后期较低，易出现早衰现象，并不是土壤真正缺氮，而与７～１４ｃｍ土层容重和穿透阻力增加，障碍层上移，可能影响水稻根系生长和吸收能力等有关；（３）连续多年少免耕植株累积吸氮量明显低于常耕，施肥区少免耕平均比常耕低１８．２％，不施肥区低４０％，不利于水稻植株生长。
In the experimental plots of continuous reduction and no-till for 11 years, the characteristics of fertilizer supply and the law of rice absorption of low no-till soil were studied. The results showed that: (1) Low tillage was beneficial to the enrichment and accumulation of soil organic matter, total nitrogen and available potassium in the upper layer. Plowing was beneficial to the mineralization of nitrogen and increased the supply of prequired available nitrogen, (2) The nitrogen content of continuous low-no-tillage plants was higher in the early stage and lower in the late stage, which was prone to premature aging. It was not the soil’s actual nitrogen deficiency. However, with the 7-14cm soil layer, the weight- Which may affect the growth and absorption capacity of rice roots. (3) The accumulative nitrogen uptake of continuous no-till no-tillage plants was significantly lower than that of conventional tillage. The average number of no-tillage in fertilization area was 18.2% lower than that of normal tillage and 40% %, Is not conducive to the growth of rice plants.