| Weathering erosion is one of the main soil erosion factors in northwestern regions of Liaoning Province and one of the causes of low-yielding fields. Researches on fertility-enhancing technologies of wind erosion soil will contribute to improve the quality of arable land, to better the agro-ecological environment and to promote optimal allocation and efficient use of resources, at last it will withstand natural disasters efficiently. The research will play a significant role for agricultural sustainable development in northwest of Liaoning. Therefore, the paper focuses on the effects of different organic materials on the wind erosio soil characteristics by different fertilizer styles such as straw, straw mulching, organic fertilizer and humic acid etc. The com field trial was carried on wind erosion soil regions,in Kangping County, Liaoning Province.Conclusions are as follows:Effects of Different organic materials on soil physical properties:Compared with the treatments of CK and conventional fertiliser, the organic material content of soil increased with the input of organic material,especially significant on treatments of straw and manure feitilizer. Considered about soil water content,at the same growth period there is no obvious difference for different treatments. But organic materials had increased soil water content, treatment of straw was most obviously. Soil bulk density was affected most obviously by the treatment of straw; Treatmen of thumic acid decreased soil pH significantly.Effects of Different organic materials on soil chemical properties:Compared with the treatment of CK,during the whole growing period the total nitrogen content in soil was increased obviously, the most significant treatment was organic fertilizer. The treatment of organic fertilizer increased the alkali-hydrolyzable nitrogen content in soil mostly,then the treatments of straw, straw mulching, humic acid. As far as the total phosphorus content in soil is concerned,the application of fertilizer and organic material can increase the content, particularly for the treatment of the organic fertilizer.And there is no significant differences among the treatments of regular fertilization, straw, straw mulching, and humic acid.Both contents of available phosphorus and total potassium in soil were increased by application of organic fertilizer, straw, straw mulching, and humic acid,the most obvious influence came from the treatment of organic fertilizer. All organic materials which were applied increased the available potassium in soil compared with CK and conventional fertilizer,while effect of organic fertilizer was more obvious relatively than other treatments.Effects of Different organic materials on soil microbial flora:the number of bacteria had an absolute increase, particularly in the jointing stage.All in all, the largest number of bacteria came from the treatment of humic acid, followed by the treatment of organic fertilizer. The amount of actinomycetes were changed with growth stages of com. Actinomycetes are aerobic bacteria and influenced by the permeability of the soil.Different organic materialshave improved the permeability of the soil,thus contributed to the actinomycetes breeding. More obvious effects occurred from the treatments of organic fertilizer, straw and humic acid.And there were more soil fungi because of application of organic fertilizer and humic acid.Effects of Different organic materials on corn yield and its chlorophyll:The average single panicle weight of corn are 298 grams,270.5 grams and 266.5 grams according to the treatments of straw,straw mulching and organic fertilizer. The highest 100-kernel weight,36.514 g is from treatment of organic fertilizer. The highest yield from treatment of organic fertilizer is 673.00 kg/acre,304.80 kg/acre higher than CK and 133.07kg/acre higher than conventional feritlizer, followed by the treatment of straw treatment. |
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