大学是人生中一个重要的时期,是从青少年过渡到成年的重要阶段,是走向社会的准备时期.大学生活对学生的一生中有着重要的影响,而对大学校园生活的适应性问题是决定大学生活学习质量的关键因素.

[Objective] The objective of this experiment was to compare the effects of three polymer compounds on the properties of salinized soil.[Method] The experiment took place in Shihezi 146 state farms.This study to the severe salinization soil through field experiment with polyacrylate (PAAS),polyacrylamide (PAM) and cellulose (HEC),the determination of the change of soil electrical conductivity,pH,salt ion content.[Result] There linds of polymer compounds could decrease soil EC and content of water-soluble Na +,Ca2 +,SO42-,Mg2 +,Cl-,HCO3-,especially water-soluble Na +.[Conclusion] Therefore,polyacrylate (PAAS),polyacrylamide (PAM) and cellulose (HEC) were the best compounds in improving salinization soil,and provide a reference for salt reducing.

微咸水及成水长期灌溉导致农田次生盐渍化加重,作物减产等问题.研究依据区域微咸水及成水盐基离子类型(Na-和Cl-离子型),进行微咸水及咸水盐基离子削减材料的筛选,利用吸附净化技术,筛选去除盐基离子的材料,并进行去盐效果的综合分析与评价.结果表明,所选降盐材料降低盐基Na +离子浓度较好的材料依次是阳离子树脂HBYX(38.48％)、碱性交换材料JQ(32.81％)和ZC-H(30.32％)及YK-BTC(27.23％);降低盐基Cl离子浓度较好的材料均是组合材料,依次是H-JQ(31.31％)、HBYX-JQ(22.47％)和GK-HBYX(21.31％);去除水体盐分最佳的都是单系统降盐材料,依次为阳离子树脂HBYX(19.45％)、弱碱性交换材料JQ(15.33％)和活性炭GK(13.04％)及活性炭YK(9.31％).

Field tests were performed in conjunction with a two-factor quadratic saturation D optimum design scheme involving phosphate and potassium to establish a binary quadratic polynomial mathematical model with phosphate and potassium as independent variables and cotton yield as target functions. This model was used to calculate cotton yield at the time of harvest. Analysis and optimization using the model yielded the optimal phosphate and potassium application amounts. The results showed that phosphate and potassium had significant effects on cotton yield. Under low levels of phosphate and potassium application,cotton yield increased with the increase of phosphate and potassium application rate. However,after reaching a certain level,the yield increase was not significant. There was a significant interaction between phosphate and potassium with regard to cotton yield. Under the experimental conditions employed in this study,phosphate and potassium application rates of 274. 4- 473. 8 and 104. 3- 180. 1 kg·hm- 2respectively reacheded cotton yields exceeding 5700- 8100 kg·hm- 2.

土壤盐渍化造成土壤退化和质量下降，如何改善盐渍化土壤质量问题是国内外学者研究的难点。作者就盐渍化土壤改良剂进行相关研究，针对盐渍化土壤，在试验室对31种常见物质在室内培养进行初次筛选，并对改良后盐渍化土壤的EC值和pH值进行测定，其中葵粕、棉粕、柠檬酸、沼液改良盐渍化土壤效果较好。

为了研究不同浓度的沼液对加工番茄发芽和催苗的影响，试验在温室大棚中进行培养试验，结果表明：沼液对加工番茄的发芽率具有显著影响，发芽期间，沼液施用量为小于15m3/hm2，可提高发芽率，沼液与水体积比<1∶6时加工番茄幼苗的存活率为100%。