沼液灌施对黄淮海平原潮土土壤团聚体组成及稳定性特征的影响

唐蛟; 王威; 潘飞飞; 殷金忠; 张喜焕; 吴大付; 孟笑峰; 杜一鸣

引用本文:	唐蛟,王威,潘飞飞,等.沼液灌施对黄淮海平原潮土土壤团聚体组成及稳定性特征的影响[J].灌溉排水学报,0,():-.
	tangjiao,wangwei,panfeifei,et al.沼液灌施对黄淮海平原潮土土壤团聚体组成及稳定性特征的影响[J].灌溉排水学报,0,():-.

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沼液灌施对黄淮海平原潮土土壤团聚体组成及稳定性特征的影响
唐蛟¹, 王威², 潘飞飞³, 殷金忠², 张喜焕², 吴大付², 孟笑峰², 杜一鸣²
1.中国农业科学院农业灌溉研究所;2.河南科技学院资源与环境学院;3.河南科技学院园艺与园林学院

摘要:

【目的】为了探究沼液灌施对黄淮海平原农田土壤团聚体结构的影响，【方法】以黄淮海平原潮土为主要研究对象，根据等氮量原则，采用干湿筛法对于连续5年进行沼液灌施（BS）、化肥施用(CF)、沼液与化肥灌施(BS+CF)以及空白对照(CK)共4种处理的农田表层土壤(0-20cm)进行团聚体筛分和稳定性指标的计算，分析土壤团聚体分布及其稳定性特征对沼液灌施的响应，以期为本区域农田土壤结构改良和沼液农田利用提供科学依据。【结果】研究结果表明：沼液灌施影响黄淮海平原表层土壤各粒径团聚体组成。相较于空白对照，不同化肥与沼液灌施处理均提高了>0.25mm力稳性土壤团聚体(MR0.25)质量组成比例，提高幅度为2.14%-3.71%；显著增加了>0.25mm水稳性土壤团聚体(WR0.25)组成比例，提高幅度达56.44%-164.20%。同时各处理对偏倚系数（Cs）和峰凸系数（CE）产生显著影响。进行化肥与沼液灌施处理能够减缓崩解作用，增强团聚体的稳定性，并使得不同团聚体分布更加均匀。此外，进行沼液灌施处理显著降低土壤团聚体破坏率（PAD），显著增加水稳性土壤团聚体稳定性。其中以沼液和化肥配施效果最佳，其团聚体破坏率最低，水稳性团聚体平均重量直径和几何平均直径最大，分形维数最小。【结论】因此，在黄淮海平原可以通过化肥与沼液配施改善潮土土壤结构，提高团聚体稳定性，促进农牧业协调发展。

关键词: 沼液，土壤团聚体，团聚体稳定性，粒径分布，潮土

DOI：

分类号:S157.3

基金项目:中国农业科学院农业水资源高效安全利用重点开放实验室开放基金(2019AA02),河南省博士后科研项目资助(201903042),河南省重点研发与推广专项(212102110388)

Effects of Biogas Slurry Irrigation on Aggregate Composition and Stability of Fluvo-aquic Soil in the Huang-Huai-Hai Plain

tangjiao¹, wangwei², panfeifei³, yinjinzhong², zhangxihuan², wudafu², mengxiaofeng², duyiming²

1.Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences;2.School of Resource and Environment, Henan Institute of Science and Technology;3.School of Horticulture and Landscape Architecture, Henan Institute of Science and Technology

Abstract:

【Objective】In order to explore the effects of biogas slurry irrigation on soil aggregation structure in the Huang-Huai-Hai Plain, biogas slurry alone (BS), chemical fertilizer alone (CF), biogas slurry combined with chemical fertilizer (BS+CF) and blank control (CK) were conducted according to the equal nitrogen principle in fluvo-aquic soil.【Method】Aggregate fractions of different sizes were sieved and measured from topsoil and several aggregate stability indexes were calculated through dry and wet sieving method.【Result】These results showed that biogas slurry irrigation influenced aggregates particle compositions. Compared with the CK, all fertilization treatments increased mass proportions of >0.25 mm mechanical-stable aggregate (MR0.25) and significantly increased >0.25 mm water-stable aggregate (WR0.25) by 2.14%~3.17% and 56.44%~164.20%. Values of mechanical- stable and water-stable aggregate skewness constant (Cs) and kurtosis constant (CE) were also affected by fertilization treatments, which promoted aggregate stability by decreasing slaking by wet sieving and sustaining relatively balanced distribution, especially in the treatment of BS+CF. Meanwhile, biogas slurry irrigation significantly reduced the destruction rate of soil aggregates (PAD) and significantly increased water-stable aggregates stability. Lowest in PAD, while water-stable aggregate mean weight diameter (MWD) and geometric average diameter (GMD) gained the largest, as well as the least fractal dimension (wD) acquired in the treatment of BS+CF.【Conclusion】This fertilization pattern was recommended to improve soil structure and aggregate stability in this region.

Key words: biogas;slurry, soil;aggregates, aggregation;stability, particle;distribution, fluvo-aquic soil