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首页> 外文期刊>Journal of Cleaner Production >Physiological regulation mechanism of multi-chemicals on water transport and use efficiency in soil-maize system
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Physiological regulation mechanism of multi-chemicals on water transport and use efficiency in soil-maize system

机译：土壤-玉米系统中多种化学物质对水分运移和利用效率的生理调控机制

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Currently, functional chemicals, such as superabsorbent polymer (SAP) and fulvic acid (FA) are commonly employed combined to enhance the utilization ability of crop to soil water in dry-land areas, which promoted greatly the sustainable development of dry-land agriculture. However, the serious insufficiency of study on regulation mechanism of multi-chemicals combined application restricts its future development. In this paper, an ingenious experiment was designed to explore the regulation mechanism of combined effects of SAP and FA on water transport and use efficiency in soil-maize system. By thorough analysis, the main indexes, i.e., root length density (RLD), root nitrogen mass density (RNMD) and stomatal conductance (SC) were determined. The regulation mechanism gradually became clear after making the relationships between the above mentioned indexes and the endogenous hormones (ABA, ZR, GA and IAA) of maize. It has been seen that SAP enhanced the rate of root water uptake (RWU) but FA reduced the RWU to a certain extent. Nevertheless, it still showed an increased trend by 16.5% on an average for RWU when SAP and FA applied combined to maize. Moreover, a potential theory could be summarized that, root growth was regulated by ABA, ABA/(ZR+GA+IAA), and stomatal conductance was regulated by ZR, ZR/ABA. Thus it revealed that multi-chemicals stimulated the release of the endogenous hormones mentioned above in crops ensuring effective utilization of soil water and inhibited the rate of transpiration to reduce soil water loss. (C) 2017 Elsevier Ltd. All rights reserved.
机译：目前，高吸收性聚合物（SAP）和黄腐酸（FA）等功能性化学物质通常被结合使用，以提高作物对旱地土壤水的利用能力，极大地促进了旱地农业的可持续发展。然而，多种化学物质联合应用的调控机理研究严重不足，制约了其未来的发展。本文设计了一个巧妙的实验，探讨了SAP和FA联合作用对土壤-玉米系统水分运移和利用效率的调节机理。通过彻底分析，确定了主要指标，即根长密度（RLD），根氮质量密度（RNMD）和气孔导度（SC）。在确定了上述指标与玉米内源激素（ABA，ZR，GA和IAA）之间的关系后，调控机制逐渐清晰。可以看出，SAP提高了根系吸水率（RWU），但FA在一定程度上降低了RWU。然而，当SAP和FA组合应用于玉米时，RWU平均仍显示出16.5％的增长趋势。此外，可以总结出一种潜在的理论，即根生长受ABA，ABA /（ZR + GA + IAA）调控，气孔导度受ZR，ZR / ABA调控。因此表明，多种化学物质刺激了上述农作物中内源激素的释放，从而确保了土壤水的有效利用，并抑制了蒸腾速率，从而减少了土壤水分的流失。 （C）2017 Elsevier Ltd.保留所有权利。

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