Effects of different improvement measures on alkaline soil characteristics and maize growth
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Abstract:
In order to improve the alkalized soil, maize straw was returned to the field in 2018 on the basis of the alkalized soil in the West Liaohe Plain Irrigation Area, and the experiments of applying Zhongnong Lukang maturing agent and Renyuan straw maturing agent, mixing sand and mixing furfural residue were carried out. The yield of spring maize, root characteristics of maize and soil available nutrients and enzyme activities were measured by conventional testing methods. The effects of different improvement measures on alkaline soil characteristics and maize growth were studied. The results showed that compared with the conventional mixed sand treatment in saline-alkali soil, the combined application of Zhongnonglukang and Renyuan straw maturing agent could significantly increase the dry weight of maize roots by 37.41% and 31.94%, increase SOD and POD activities of roots and decrease MDA content of roots, and significantly increase the content of soil alkali-hydrolyzed nitrogen at silking stage by 21.32% and 39.18% respectively. The content of soil available phosphorus increased by 121.89% with the application of Renyuan straw decomposing agent, 171.28% of ammonium nitrogen was increased by Zhongnong lvkang straw decomposition agent;The combined application of Zhongnong Lukang significantly increased soil cellulase activity, and the combined application of Zhongnong Lukang straw maturing agent significantly increased maize yield by 17.65%. Corn straw returning to the field in alkaline soil combined with Zhongnong Lukang straw ripening agent had better effect.
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