河北省典型土壤磷库状况及对长期施磷和秸秆还田的响应

发布时间：2018-04-13 06:46

本文选题：山麓平原 + 低平原　；参考：《中国土壤与肥料》2017年06期

【摘要】：通过大面积田间土壤养分测定及与1978年第二次土壤普查结果比较,系统研究了河北省不同农业生态类型区典型褐土、潮土、水稻土土壤磷素状况及其演变规律,并基于肥料定位试验系统研究了河北省典型褐土、潮土上长期施用磷肥、秸秆还田对土壤各形态磷库的影响。结果表明:河北省主要农业生态类型区土壤全磷、无机磷总量、Olsen-P含量均表现为太行山山麓平原褐土区海河冲积低平原潮土区冀东滨海平原水稻土区。1978年二次土壤普查至2014年的36年间,褐土、潮土、水稻土土壤全磷分别增加66.5%、32.8%、23.2%;Olsen-P分别增加了444.9%、533.4%和171.8%,有效磷占全磷的比重呈逐渐增加趋势。太行山山麓平原典型褐土上连续7年施用P2O575~210 kg/hm2,与P1相比,土壤Olsen-P占全磷比重以及Ca2-P、Ca8-P占全磷、无机磷的比重均随磷用量的增加呈增加趋势,O-P占无机磷比重随磷肥用量的增加呈降低趋势。山麓平原典型潮土中小麦秸秆还田22年,土壤全磷、无机磷总量、Olsen-P无显著增加,土壤无机磷中Ca2-P、Al-P、Fe-P、O-P、Ca10-P均无显著变化,Ca8-P显著增加。
[Abstract]:Based on the measurement of soil nutrients in a large area and the comparison with the results of the second soil survey in 1978, the phosphorus status and evolution of typical cinnamon soil, tidal soil and paddy soil in different agricultural ecological types in Hebei Province were studied systematically.Based on the fertilizer location test system, the effects of long-term application of phosphorus fertilizer and straw returning to soil on various forms of phosphorus pool in typical cinnamon soil of Hebei Province were studied.The results showed that soil total phosphorus in the main agro-ecological regions of Hebei Province,The content of total inorganic phosphorus (Olsen-P) in Haihe Alluvial low Plain Paddy soil area of Taihang Mountain Piedmont Plain was 36 years from the second soil survey in 1978 to 2014.The total phosphorus in paddy soil increased by 66.5% and 32.8%, respectively. Olsen-P increased by 444.9% and 171.8%, respectively. The proportion of available phosphorus to total phosphorus increased gradually.In the typical cinnamon soil of Taihang Mountain Piedmont Plain, the application of P2O575~210 kg 路hm ~ (2 +) for 7 consecutive years, compared with P1, the proportion of Olsen-P to total phosphorus and Ca _ (2-P) Ca _ (8-P) to P ~ (2 +) in soil.The specific gravity of inorganic phosphorus increased with the increase of the amount of phosphorus, and the proportion of O-P to inorganic phosphorus decreased with the increase of the amount of phosphate fertilizer.When wheat straw was returned to the field for 22 years, the total amount of total phosphorus and total inorganic phosphorus in soil did not increase significantly, but Ca 2-P in Ca 2-Pu Al-Pu Fe P O P O P 10 P in soil had no significant change in Piedmont Plain, and Ca 8-P was significantly increased.
【作者单位】：河北农业大学资源与环境科学学院;河北省农田生态环境重点实验室;河北省农林科学院农业资源环境研究所;
【基金】：河北省科技支撑项目(12220204D;HBNZTS201502)
【分类号】：S158

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