滴灌磷肥在灰漠土中运移的研究
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作者单位:

(1.新疆农垦科学院农田水利与土壤肥料研究所,新疆 石河子 832000;2.中国农业大学资源与环境学院,生物多样性与有机农业北京市重点实验室,北京 100193;3.新疆农垦科学院,新疆 石河子 832000)

作者简介:

杨国江(1978-),男,宁夏隆德人,副研究员,本科,主要研究方向为土壤肥料与植物营养。E-mail:183532457@qq.com。通讯作者:尹飞虎,E-mail:nkyyfh@sohu.com。

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基金项目:

基金项目:国家重点研发计划项目(2017YFD0200203);公益性(农业)行业专项(201203012)。


Phosphorus migration of monoammonium phosphate via drip-irrigation in gray desert soil
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Affiliation:

(1.Research Institute of Farmland Water Conservancy and Soil -fertilizer,Xinjiang Academy of Agricultural and ReclamationSciences,Shihezi Xinjiang832000;2.College of Resourcesand Environmental Sciences,Beijing Key Laboratory of Biodiversity and Organic Farming,China Agricultural University,Beijing100193;3.Xinjiang Academy of Agricultural and ReclamationSciences,Shihezi Xinjiang832000)

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    摘要:

    磷在土壤中的迁移是影响农业系统磷利用效率的关键因素之一。应用同位素 32P示踪和放射性同位素自显影技术,研究了滴施磷酸一铵在灰漠土中的运移。结果表明:与不施磷处理相比,滴施磷肥可以增加 0~ 15cm土层有效磷的含量。在 0~ 20 cm土层均有不同比例 32P的分布,但大部分 32P仍集中分布在表层,0~ 10 cm土层中的 32P占总量的 72.7%~89.5%,最高可达99%。不同施肥时期磷的运移距离有很大差异,T3(0~ 20cm)>T2(0~ 10 cm)>T1(0~ 5 cm),这可能是由于干湿交替导致土壤孔隙率变化,进而影响了磷的移动距离。平行于滴灌带方向上磷的运移距离比垂直于滴灌带方向更远。随着正磷酸盐浓度增加,磷的运移距离变大,滴施磷酸一铵处理 32P的移动距离达到对照的 2倍。

    Abstract:

    The migration of phosphorus in soil is one of the key factors affecting the P use efficiency in agriculture system.Phosphorus distribution in gray desert soil from monoammonium phosphate(MAP)applied by drip -irrigation was studied by 32P isotope tracing and autoradiography technique in greenhouse. Our results showed that compared with no phosphatetreatment(CK),drip fertigation of phosphate fertilizer increased the Olsen P in the 0~ 15 cm layer. Different proportions of 32P were found in every layers within 20 cm depth and 72.7%~ 89.5% of the 32P was retained in the 0~ 10 cm depths.The decreasing order of the migration distance of the P wasT3(0~ 20cm)>T2(0~ 10cm)>T1(0~ 5cm),whichwas mainly attributed to the dry and wet alternation and different soil porosity at different times. The migration ofphosphorus,which was in parallel to the drip tape,was more active than that of vertical to the drip tape. The longer distance P migration was with higher P concentration in soil. The 32P migration in treatments of MAP was twice than that of the CK treatment.

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杨国江,彭懿,尹飞虎,石磊.滴灌磷肥在灰漠土中运移的研究[J].中国土壤与肥料,2020,(6):138-146.

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  • 收稿日期:2019-10-26
  • 最后修改日期:
  • 录用日期:2020-01-31
  • 在线发布日期: 2021-01-21