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采用常规施肥、减20%施肥和不施肥3种施肥水平,研究两种耕作方式(半旱式、平作)对水稻产量、品质、稻田土壤和水体中氮、磷质量分数的影响.结果表明:①半旱式耕作方式在3种施肥水平下水稻产量均比平作同等施肥水平高,半旱式耕作有利于水稻增产.②半旱式常规减20%施肥水平下,土壤中氮、磷质量分数明显升高,水体中氮、磷呈现降低的趋势,有效地降低了氮、磷流失的风险;半旱式耕作对减少氮、磷流失的效果较平作方式好.
The effects of two tillage methods (semi-arid and flat-cropping) on the yield and quality of rice, nitrogen and phosphorus content in paddy soils and water bodies were studied using conventional fertilization, 20% fertilization and no fertilization.The results showed that: ① Semi-arid tillage mode The yield of rice under the three fertilization levels was higher than that under the same cropping condition, and the semi-arid tillage was beneficial to the increase of rice yield.② Under the semi-arid conventional 20% fertilization level, the nitrogen and phosphorus contents Obviously increased, the nitrogen and phosphorus in water bodies showed a decreasing trend, which effectively reduced the risk of nitrogen and phosphorus loss; the effect of semi-arable cultivation on reducing the loss of nitrogen and phosphorus was better than that of the control.