Effect of long term application of super absorbent polymer on soil structure, soil enzyme activity, photosynthetic characteristics, water and nitrogen use of winter wheat
文献类型： 外文期刊
作者： Yang, Yonghui 1 ; Zhang, Sensen 4 ; Wu, Jicheng 1 ; Gao, Cuimin 1 ; Lu, Defu 5 ; Tang, Darrell W. S. 6 ;
作者机构： 1.Henan Acad Agr Sci, Inst Plant Nutr & Resource Environm, Zhengzhou, Peoples R China
2.Minist Agr, Yuanyang Expt Stn Crop Water Use, Yuanyang, Peoples R China
3.Field Sci Observat & Res Stn Water Saving Agr Yell, Yuanyang, Peoples R China
4.Henan Prov Inst Geol, Zhengzhou, Peoples R China
5.Geol Term Henan Prov Nonferrous Met Geol Mineral R, Zhengzhou, Peoples R China
6.Wageningen Univ & Res, Soil Phys & Land Management Grp, Wageningen, Netherlands
关键词： winter wheat; super absorbent polymer (SAP); soil microbial biomass carbon; soil enzyme activity; photosynthetic characteristics; water use; nitrogen use
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）
ISSN： 1664-462X
年卷期： 2022 年 13 卷
页码：
收录情况： SCI
摘要： IntroductionWater scarcity and seasonal drought are major constraints on agricultural development globally. Super absorbent polymer (SAP) is a good amendment that can improve soil structure, increase soil water retention, and promote crop growth even with less soil moisture. We hypothesize that long term application of SAP has a better effect on soil organic carbon, soil enzyme activity, photosynthetic characteristics, yield, and water and nitrogen use than short term application. MethodsA long term field experiment with different application rates (0 (CK), 15 (L), 30 (M), 45 (H) kg ha(-1)) of SAP was conducted at the Yuzhou water conservation agriculture base of the Henan Academy of Agricultural Sciences from 2011 to 2019. Results and DiscussionThe results indicate that applying SAP increases > 0.25 mm aggregates and decreased<0.25 mm aggregates in the soil after one year (2011) and 9 years (2019) of application. In addition, soil organic carbon, soil microbial biomass carbon, soil sucrase and cellulase activities, soil water consumption, water consumption, net photosynthetic rate (Pn), leaf water use efficiency (LWUE) of wheat and yield, all increased after SAP application. SAP also boosts water use efficiency and nitrogen use efficiency. Correlation analyses show that SAP promotes the growth of wheat, and improves the utilization rate of soil water and nutrients by improving the soil structure and increasing soil organic carbon and microbial enzyme activity. ConclusionBased on our research, SAP treatment at a dosage of 45 kg ha(-1) is most effective and is thus recommended.
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