Abstract
Macromolecule water absorbent resin has functions such as water absorption, soil moisture conservation and soil improvement, as well as other functions. In this study, in order to explore the effect of macromolecule water absorbent resin on wheat roots and to determine the physiological characteristics of the leaves during different growth stages, a field experiment of the application of macromolecule water absorbent resin was conducted on the dry land. Root vigor and leaf relative water content (leaf water potential) and improved the photosynthetic physiological characteristics and increased yield and water production efficiency of the wheat. The root vigor with the application of a 54 kg/hm^2 dosage of macromolecule water absorbent resin was found to be the strongest in the jointing, booting and grain filling period and the leaf relative water content with this dosage treatment was also the greatest. During the jointing and booting periods, the photosynthetic rate, transpiration rate and leaf water use efficiency with the application of a 54 kg/hm^2 dosage of macromolecule water absorbent resin were found to be the highest. In summary, the effect of the application of a 54 kg/hm^2 dosage of macromolecule water absorbent resin was found to be the most effective.
Highlights
During drought conditions, the moisture content has an important impact on the photosynthetic characteristics of wheat (Keck and Boyer, 1974; Tezara et al, 1999; Lawlor and Cornic, 2002; Li et al, 2006) and 90-95% of the wheat yield comes from its photosynthesis (Hu et al, 1986)
Effect of the macromolecule water absorbent resin on soil moisture: Soil moisture has an important effect on crop physiological characteristics
In different growth stages of wheat, with the increase of macromolecule water absorbent resin, soil moisture content increased at first and decreased, soil moisture with the dosage of 54 kg/hm2 macromolecule water absorbent resin was highest, which was conducive to be better for wheat
Summary
The moisture content has an important impact on the photosynthetic characteristics of wheat (Keck and Boyer, 1974; Tezara et al, 1999; Lawlor and Cornic, 2002; Li et al, 2006) and 90-95% of the wheat yield comes from its photosynthesis (Hu et al, 1986). Investigating the responses of the physiological characteristics of root systems to drought stress can allow for more efficient determination of drought resistance in plants (Sharp et al, 2004). When there is soil drought and water shortage, the macromolecule water absorbent resin can release the absorbed water, which can be absorbed by plant roots, which benefits its growth and development. Macromolecule water absorbent resin can significantly improve the water holding capacity of soil (Dong et al, 2004; Yang et al, 2006, 2007), inhibit invalid loss of soil moisture (Sun et al, 2001a) and improve the utilization efficiency of water resources (Zhang et al, 2009). Technol., 11(2): 172-179, 2016 application of an appropriate amount of macromolecule
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