Effects of Water-Fertilizer-Air-Coupling Drip Irrigation on Soil Health Status: Soil Aeration, Enzyme Activities and Microbial Biomass
文献类型： 外文期刊
作者： Lei, Hongjun 1 ; Yu, Jie 1 ; Zang, Ming 1 ; Pan, Hongwei 1 ; Liu, Xin 1 ; Zhang, Zhenhua 2 ; Du, Jun 3 ;
作者机构： 1.North China Univ Water Resources & Elect Power, Sch Water Conservancy, Zhengzhou 450046, Peoples R China
2.Ludong Univ, Sch Hydraul Engn, Yantai 264025, Peoples R China
3.Henan Acad Agr Sci, Inst Plant Nutr Agr Resources & Environm Sci, Zhengzhou 450002, Peoples R China
关键词： soil aeration; soil enzyme activity; soil microbial biomass; structural equation model
期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）
ISSN：
年卷期： 2022 年 12 卷 11 期
页码：
收录情况： SCI
摘要： In order to investigate the effects of water-fertilizer-air-coupling drip irrigation on soil health status, including soil aeration (SA), enzyme activity (EA) and microbial biomass (MB), and its response relationship, this glasshouse experiment was conducted using tomato as the test crop, and we designed two fertilization gradients of 135 and 180 kg N.ha(-1), two irrigation levels of 0.6-fold and 1.0-fold of the crop-pan coefficient, and two aeration treatments of 5 and 15 mg.L-1 for the three-factor and two-level completely randomized block experiment. The effects of soil dissolved-oxygen concentration, oxygen diffusion rate, soil respiration rate, soil urease, catalase, phosphatase activities and soil microbial biomass were systematically monitored and analyzed in the middle and at the end of crop growth. A structural equation model was used to comprehensively analyze the response relationship among relevant influencing factors. The results showed that coupled drip irrigation increased the soil's dissolved oxygen, oxygen diffusion rate and soil respiration rate by 14.05%, 30.14% and 53.74%, respectively. Soil urease, catalase and phosphatase activities increased by 22.83%, 93.01% and 61.35%, respectively. The biomass of bacteria, fungi and actinomycetes increased by 49.06%, 50.18% and 20.39%, respectively. The results of a structural equation model analysis showed that water-fertilizer-air-coupling drip irrigation could effectively improve soil health status, and the descending order of influence was MB > EA > SA. This study provides scientific knowledge to reveal the improvement of soil health status by water-fertilizer-air-coupling drip irrigation.
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