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本文研究了长期施肥(7年和17年)在红壤和红壤性水稻土上养分在土壤剖面中的下移。结果表明施入氮肥使水解氮在整个剖面中比对照处理均有增加,氮素下移可达100cm,而磷只在耕层有显著增加(20cm以内),交换性钾的下移虽较磷素为深,但主要集中在40cm土层中。有机肥中磷的活动性较化肥为大,下移深度可达40cm以上。
This paper studied the long-term fertilization (7 years and 17 years) in red soil and red paddy soil nutrients in the soil profile down. The results showed that applying nitrogen fertilizer increased the amount of hydrolyzed nitrogen in the whole cross-section compared with the control. The nitrogen could be transferred down to 100 cm, while the phosphorus increased only significantly (up to 20 cm) in plow layer. Prime for the deep, but mainly concentrated in 40cm soil layer. The activity of phosphorus in organic fertilizer is larger than that of chemical fertilizer, and the depth of downward movement can reach more than 40cm.