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2Â¥2015-05-20 09:40:46
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²Ì¾²²Ì¾²: ½ð±Ò+20, ¡ï¡ï¡ïºÜÓаïÖú, ллÄã 2015-05-20 12:51:29
This paper studies the long-term fertilization of organic manure and chemical fertilizer on apple orchard soil physical and chemical properties, the results show that the long-term application of chemical fertilizer longer-term organic apple orchard soil pH value is low 7%; Long-term application of chemical fertilizer apple orchard soil organic carbon, total nitrogen, total potassium and ammonium nitrogen, available potassium content and organic compared with no significant difference; But the long-term application of chemical fertilizer apple orchard soil total phosphorus, available phosphorus, nitrate nitrogen content is significantly higher than that of organic, increase 236.1%, 204.4%, 236.1%; Long-term application of chemical fertilizer decreased the tree p absorption and utilization, lead to the accumulation of a lot of p in soils, eventually lead to the loss of phosphorus removal.
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3Â¥2015-05-20 10:57:05
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