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采用田间磷肥试验和田间定位监测相结合的方法,研究了不同磷用量下土壤磷素的动态积累对土壤有效磷(Olsen-P)在大白菜和辣椒上的产量反应,探讨用土壤有效磷反映土壤供磷能力和作为推荐磷肥用量的依据。结果表明:磷肥和土壤Olsen-P在白菜和辣椒上的产量效应均符合一元二次式。土壤磷素收支平衡33.7%~680.4%,土壤Olsen-P占土壤磷积累量的17.7%~28.9%。0~20 cm日光温室土壤磷素收支平衡124.1%~293.6%,0~20 cm土壤Olsen-P的年均积累量为23.1~32.2 mg/kg,土壤Olsen-P占土壤磷积累量的16.6%~24.2%。20~100 cm日光温室土壤Olsen-P的增加量随着施磷时间的延长而逐渐增加。土壤Olsen-P在植物上的产量效应符合一元二次式。农田磷的积累量与土壤Olsen-P的增加量呈直线正相关,土壤Olsen-P的增加量占农田积累磷的17.7%~28.9%。土壤供磷能力和磷素平衡是确定磷肥用量的重要参数。
In this paper, the combination of field phosphate fertilizer and field monitoring was applied to study the effects of soil P accumulation on the yield of Olsen-P in Chinese cabbage and pepper under different phosphorus levels. The effects of soil available phosphorus Soil phosphorus availability and as a basis for the recommended amount of phosphate fertilizer. The results showed that the yield effects of phosphate and soil Olsen-P on cabbage and pepper all fit the quadratic formula. The balance of soil phosphorus balance was 33.7% ~ 680.4%, and the soil Olsen-P accounted for 17.7% ~ 28.9% of the soil P accumulation. The P balance of soil in 0-20 cm solar greenhouse was 124.1% -293.6%, that of Olsen-P in 0-20 cm soil was 23.1-32.2 mg / kg, and that of soil Olsen-P was 16.6% % ~ 24.2%. The increase of Olsen-P in 20-100 cm sunlight greenhouse soil increased with the extension of P application time. The yield effect of soil Olsen-P on plants accords with the quadratic formula. The accumulation of phosphorus in farmland was positively correlated with the increase of soil Olsen-P. The increase of soil Olsen-P accounted for 17.7% -28.9% of the accumulated phosphorus in farmland. Soil phosphorus supply capacity and phosphorus balance is an important parameter to determine the amount of phosphate fertilizer.