长期施肥条件下黄潮土有效磷对磷盈亏的响应

doi:10.7668/hbnxb.2015.06.034

摘要/Abstract

摘要： 为阐明不同施肥条件下土壤有效磷与土壤磷素累积的响应关系,为黄潮土农区科学施用磷肥提供依据.分析了黄潮土34年(1980-2014年)肥料长期定位试验中,不同施肥处理下土壤磷素盈亏与土壤有效磷的变化特征.结果表明:长期不施磷肥处理(CK、N)土壤有效磷含量随年限的延长呈极显著(P<0.01)下降趋势,年均分别降低0.16,0.11 mg/kg;长期施用有机肥及有机无机配施处理(M 、MN、MNP、MNPK),土壤有效磷含量呈极显著(P<0.01)上升趋势,年均分别增加1.12,1.00,1.65,1.49 mg/kg;而长期施用化学磷肥处理(NP、NPK),土壤有效磷含量呈持平的趋势. 土壤有效磷变化量随磷素盈亏而变化,不施磷肥处理(CK、N),土壤中的磷素均亏缺,土壤每亏缺100 kg/hm²磷, 有效磷含量降低分别为0.68,0.47 mg/kg;长期施用有机肥及有机无机配施处理(M、MN、MNP、MNPK),土壤中的磷素均有盈余,土壤中每盈余100 kg/hm²磷所能增加的土壤有效磷含量分别为1.98,2.19,1.56,1.42 mg/kg.

关键词: 长期施肥, 黄潮土, 有效磷, 磷盈亏

Abstract: Response of Olsen-P to P balance in a yellow fluvo-aquic soil was studied in a long-term fertilization experiment carried out in Xuzhou,Jiangsu province for the purpose of providing a theoretical basis for the scientific application of phosphate fertilizer in the yellow fluvo-aquic soil farming areas.The relationships between Olsen-P change and the budget of soil P balance in the eight treatments were studied by the method of linear regression based on a 34-year (1980-2014) experiment.The results showed that long-term application of CK and N resulted in significant decrease of Olsen-P by 0.16 and 0.11 mg/kg,and M,MN,MNP,MNPK resulted in significant increase of Olsen-P by 1.12,1.00,1.65,1.49 mg/kg,respectively.While the soil Olsen-P content remained stable in the NP and NPK treatments.The increase amount of Olsen-P changed with P balance.Application of CK and N reduced the amount of Olsen-P significantly.With an average wane of 100 kg phosphorus per ha,the soil Olsen-P decreased by 0.68 and 0.47 mg/kg,in the CK,N treatments,respectively.Application of M,MN,MNP and MNPK increased the amount of Olsen-P significantly.With an average surplus of 100 kg phosphorus per ha,the soil Olsen-P increased by 1.98,2.19,1.56,1.42 mg/kg,in the M,MN,MNP and MNPK treatments,respectively.Long-term application of organic combined with chemical fertilizer resulted in the increase of the amount of Olsen-P is higher than another treatments.

Key words: Long-term fertilization, Yellow fluvo-aquic soil, Olsen-P, P balance

中图分类号:

S143.2

魏猛, 张爱君, 李洪民, 唐忠厚, 陈晓光, 诸葛玉平. 长期施肥条件下黄潮土有效磷对磷盈亏的响应[J]. 华北农学报, 2015, 30(6): 226-232. doi: 10.7668/hbnxb.2015.06.034.

WEI Meng, ZHANG Ai-jun, LI Hong-min, TANG Zhong-hou, CHEN Xiao-guang, ZHUGE Yu-ping. Response of Olsen-P to P Balance in Yellow Fluvo-aquic Soil under Long-term Fertilization[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(6): 226-232. doi: 10.7668/hbnxb.2015.06.034.

http://www.hbnxb.net/CN/Y2015/V30/I6/226

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