长期施肥对灰漠土无机磷组分的影响

发布时间：2018-03-13 03:16

本文选题：长期施肥　切入点：灰漠土　出处：《土壤通报》2017年04期 　论文类型：期刊论文

【摘要】：以国家灰漠土土壤肥力与肥料效益长期监测站为平台,采用蒋柏藩-顾益初土壤无机磷分组方法,对23年长期定位施肥条件下、不同施肥处理土壤无机磷总量(IOP)及组分(Ca_2-P、Ca_8-P、Al-P、Fe-P、O-P、Ca_(10)-P)进行测定,以掌握长期施肥对干旱区灰漠土无机磷组分的影响规律并指导合理施肥。结果表明,长期不施肥(CK)处理土壤无机磷总量无显著变化,组分间主要发生Ca_2-P、Ca_8-P向Ca_(10)-P的转化;长期施肥(NPK、NPKM、NPKS)处理IOP极显著增加,其增加量主要为Ca_2-P、Ca_8-P、Al-P和Fe-P,其中前三者增加作用极为显著;长期施肥条件下,土壤无机磷组分中Ca_8-P转化率最高、占土壤无机磷转化总量的39%~50%,其次是Al-P、占16%~30%,再次是Ca_2-P、占10%~29%,三者合计占78%~88%,其余三种组分Fe-P、O-P、Ca_(10)-P占12%~22%。
[Abstract]:Based on the long-term monitoring station of soil fertility and fertilizer benefit of the national grey desert soil, using the grouping method of inorganic phosphorus in the soil of Jiangbafan-Gu Yi-chu, under the condition of long-term fertilization for 23 years, The total amount of inorganic phosphorus (IOP) and the composition of CaAC _ 2-P _ (2) P _ (+) Ca _ (8-P) -P _ (8) -P _ (10) -P _ (10) -P) were determined in order to understand the effect of long-term fertilization on the inorganic phosphorus composition of grey desert soil in arid area and to guide the rational application of fertilizer. There was no significant change in the total amount of inorganic phosphorus in the soil treated by CK), and the transformation of Ca2-P+ Ca8-P into Ca_(10)-P occurred mainly among the components, and the IOP of long-term fertilizing treatment increased significantly, the increase of which was mainly Ca2-Pna-Ca8-P+ Al-P and Fe-P, and the effect of the former three was very significant. Under the condition of long-term fertilization, the conversion rate of Ca_8-P was the highest among the inorganic phosphorus components in the soil, accounting for 39% of the total transformation amount of inorganic phosphorus in the soil, followed by Al-P, accounting for 1630%, and again, Ca, 2-P, and 10 ~ 2929. The other three components, Fe-PO-PCaCa10-P, accounted for 122.22% of the total amount of Fe PO-PCaCa10-P, and the other three components, Fe-PO-PCa10-P, accounted for 122.22% of the total conversion rate of inorganic phosphorus in the soil under the condition of long-term fertilization.
【作者单位】：新疆农业科学院土壤肥料与农业节水研究所;中国农业科学院农业资源与农业区划研究所/国家土壤肥力与肥料效益长期监测站网;
【基金】：国家自然科学基金(41161054、41661075) 科技支疆项目(2016E02020)资助
【分类号】：S153.6

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