PDF(Pubmed)
Abstract：
UNASSIGNED: Water 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.
UNASSIGNED: A 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.
UNASSIGNED: The 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.
UNASSIGNED: Based on our research, SAP treatment at a dosage of 45 kg ha-1 is most effective and is thus recommended.
UNASSIGNED: A 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.
UNASSIGNED: The 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.
UNASSIGNED: Based on our research, SAP treatment at a dosage of 45 kg ha-1 is most effective and is thus recommended.
摘要：
水资源短缺和季节性干旱是全球农业发展的主要制约因素。高吸水性聚合物（SAP）是一种很好的改良剂，可以改善土壤结构，增加土壤保水性，即使土壤水分较少，也能促进作物生长。我们假设长期施用SAP对土壤有机碳的影响更好，土壤酶活性，光合特性,产量，和水和氮的使用比短期应用。
未经批准：具有不同施用量的长期田间试验（0（CK），15(L),30(M),2011年至2019年在河南省农业科学院禹州节水农业基地进行了45(H)kgha-1)的SAP。
UNASSIGNED：结果表明，施用SAP在施用一年（2011年）和9年（2019年）后，土壤中增加了>0.25毫米的聚集体，减少了<0.25毫米的聚集体。此外,土壤有机碳，土壤微生物生物量碳，土壤蔗糖酶和纤维素酶活性，土壤水分消耗，用水量,净光合速率(Pn)，小麦叶片水分利用效率(LWUE)和产量，应用SAP后全部增加。SAP还提高了水的利用效率和氮的利用效率。相关分析表明,SAP促进了小麦的生长,并通过改善土壤结构，提高土壤有机碳和微生物酶活性，提高土壤水分和养分的利用率。
未经授权：根据我们的研究，以45kgha-1的剂量进行SAP治疗是最有效的,因此是推荐的。
未经批准：具有不同施用量的长期田间试验（0（CK），15(L),30(M),2011年至2019年在河南省农业科学院禹州节水农业基地进行了45(H)kgha-1)的SAP。
UNASSIGNED：结果表明，施用SAP在施用一年（2011年）和9年（2019年）后，土壤中增加了>0.25毫米的聚集体，减少了<0.25毫米的聚集体。此外,土壤有机碳，土壤微生物生物量碳，土壤蔗糖酶和纤维素酶活性，土壤水分消耗，用水量,净光合速率(Pn)，小麦叶片水分利用效率(LWUE)和产量，应用SAP后全部增加。SAP还提高了水的利用效率和氮的利用效率。相关分析表明,SAP促进了小麦的生长,并通过改善土壤结构，提高土壤有机碳和微生物酶活性，提高土壤水分和养分的利用率。
未经授权：根据我们的研究，以45kgha-1的剂量进行SAP治疗是最有效的,因此是推荐的。
