| 引用本文: | 唐蛟,王威,潘飞飞, 等.沼液灌施对潮土土壤团聚体组成及稳定性的影响[J].灌溉排水学报,2022,41(2):10-17. |
| TANG Jiao,WANG Wei,PAN Feifei, et al..沼液灌施对潮土土壤团聚体组成及稳定性的影响[J].灌溉排水学报,2022,41(2):10-17. |
|
| 摘要: |
| 【目的】探究沼液灌施对黄淮海平原土壤团聚体结构的影响。【方法】以黄淮海平原潮土为研究对象，根据等氮量原则，采用干湿筛法对连续4 a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（0~20 cm）进行团聚体筛分并计算稳定性指标。【结果】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CK，不同化肥与沼液灌施处理>0.25 mm力稳性土壤团聚体（MR0.25）质量组成比例提高了2.14%~3.71%；>0.25 mm水稳性土壤团聚体（WR0.25）组成比例显著增加了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。化肥与沼液灌施处理能够减缓崩解作用，增强团聚体稳定性，并使不同粒径团聚体分布更加均匀。此外，沼液灌施显著降低了土壤团聚体破坏率（PAD），显著增加了水稳性土壤团聚体稳定性。沼液和化肥配施团聚体破坏率最低，水稳性团聚体平均质量直径（MWD）和几何平均直径（GMD）值最大，分形维数（D）值最小。【结论】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。 |
| 关键词: 沼液；土壤团聚体；团聚体稳定性；粒径分布；潮土 |
| DOI：10.13522/j.cnki.ggps.2021293 |
| 分类号: |
| 基金项目: |
|
| The Effects of Biogas Slurry Irrigation on Aggregation and Stability of Fluvo-aquic Soil in Huang-Huai-Hai Plain |
|
TANG Jiao, WANG Wei, PAN Feifei, et al.
|
|
1. Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China;
2. Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resources, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; 3. School of Resource and Environment Sciences, Henan Institute of Science and Technology,
Xinxiang 453003, China; 4. Mobile Post-doctorate Station, Henan Agricultural University, Zhengzhou 450002, China;
5. School of Horticulture and Landscape Architecture, Henan Institute of Science and Technology, Xinxiang 453003, China
|
| Abstract: |
| 【Objective】Irrigation with biogas slurry is not only a way to deal with the wastes produced by livestock industry, but can also improve soil quality and facilitate nutrient availability. Considering that soil aggregate is unit often used to quantity soil structure, we investigate how biogas slurry irrigation combined with fertilization affects aggregation of typical soils in Huang-Huai-Hai Plain in north China.【Method】The experiment was conducted in a field of fluvo-aquic soil; it compared three treatments: irrigation with biogas slurry (BS), chemical fertilization (CF), combining biogas slurry irrigation and chemical fertilization (BS+CF). Nitrogen (N) applications in all treatments were kept the same, and a blank treatment was taken as the control (CK). In each treatment, we measured aggregates of different sizes in the topsoil using the dry and wet sieving method.【Result】Irrigation with the biogas slurry altered aggregate composition. Compared to the CK, the treatments increased the mass proportions of the mechanically-stable aggregate >0.25 mm by 2.14%~3.17%, and of the water stable aggregates>0.25 mm by 56.44%~164.20%. The treatments also impacted the skewness constant and kurtosis constant of both mechanically- and water-stable aggregates, by improving aggregate stability due to the decrease in slaking, especially BS+CF. Biogas slurry irrigation significantly reduced aggregate destruction and increased aggregate stability, both at significant level. The aggregates in BS+CF treatment were most stable, have the largest weight and geometric diameters and the least fractal dimension.【Conclusion】Biogas slurry irrigation combined with chemical fertilization improved soil aggregation and soil quality. It can be used as an improved agronomic practice to deal with the wastes produced by livestock industry and to improve soil productivity. |
| Key words: biogas slurry irrigation; soil aggregates; aggregation stability; particle distribution; fluvo-aquic soil |
