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毕业论文-非生长季节保水措施在辽北生态脆弱区的应用，正文共15页，9351字。
摘 要
本文选择了位于辽西北地区的铁岭市昌图县古榆树镇大房村为实验地点，该地区处于松辽平原与科尔沁沙地之间的生态脆弱区，由于自然环境的影响，该地区长期处于干旱、半干旱状态，试验地土壤为沙土，保水性较差。在传统耕作条件下，土壤水分散失速度快，土壤水分含量低。由于土壤中的水分得不到及时的补充，影响了农作物的正常生长与发育，给当地农业生产带来极大威胁，由于干旱造成的减产现象时有发生，给当地经济的发展造成了不利影响。
本试验主要研究非生长季节施用不同保水措施（其中包括农家肥处理，保水剂处理，保水剂与农家肥混施处理以及秸秆覆盖处理和落叶覆盖处理等）对生长季节土壤水分的影响，并在实验基础上验证辽西北生态脆弱区不同保水措施可以提高土壤保水保墒的可行性。
通过分析得知，各保水措施均能够明显的提高处理的土壤水分含量，各保水措施处理的保水能力强弱顺序为：保水剂高量〉保水剂与农家肥混施〉保水剂低量〉农家肥高量〉落叶覆盖〉秸秆覆盖〉农家肥低量。实验表明，施用不同保水措施后，土壤水分含量有不同程度的提高，从而为有效的提高作物产量奠定了基础。
关键词： 保水措施；土壤水分；保水剂；农家肥；秸秆覆盖；落叶覆盖
Abstract
The paper selecting works chooses GuYuSu town, changtu, TieLing in the northwest of Liaoning province. We have also analysised the soil humidity content. This area is between in Songliao plain and the keerqin Sand ground and it’s also an ecological weak area. As the influence of natural environment, this area is aways dry in a longtime. The classic character of the soil is as follow. The sand soil’s function of water protection is bad, the speed of soil water lose is quick, and the humidity content is low. As the[ ]of water isn’t on time, the soil is lack of a great deal of water that the growth and development of crop need. As a result, many in the crop’s growth and development are constrained, the increasing of the crop’s out put is stopped, and sometimes the out put even decrease. Then the region economy will be impacted.
In the paper, through different kinds of water protection measures (include organic manure processing, aquasorb processing, organic manure with aquasorb a common use, the straw mulch of a few measure), We can verify the possibility of increasing the ability of water protection and dissimilarity protection.
From the analysis, the consequence of the ability of water protection and dissimilarity protection is dosages aquasorb> organic manure with aquasorb a common use> jot more aquasorb> dosages organic>straw mulch>????????> jot more dosages organic.The experiment suggest that through different kinds of water protection procession, the soil humidity content can be increased at different tent and pave the way for increasing the crop’s out put effectively. In the northwest of Liaoning region can expand the application.
Key words: water-retention treatments; soil moisture; water-retention preparation; Organic manure; straw mulching; leaves mulching