钙增效剂对稻米中钙等矿质元素积累及稻米品质的影响

利用粳稻品种探讨了钙增效剂对稻米中钙及铜、锰、镁、铁、锌积累和品质的影响。试验结果表明,五种钙增效剂对稻米的钙含量都有增加效果,其中活性钙-S钙增效剂的处理稻米中Ca的含量最高,比对照增加54.5%,而且360mg/kg施用浓度效果最好;稻米中的微量元素含量测定表明,不同种类钙增效剂的叶面喷施对稻米中微量元素积累的效果不尽相同,五种钙增剂叶面喷施对稻米中Fe、Mg和 Zn含量有明显增加,而稻米中Mn和Cu的含量反而降低的趋势;经多元回归分析表明,Ca积累与Fe和Mn积累最为密切,呈正相关;Ca含量与稻米中直链淀粉（AC）呈显著正相关、与CPV、SBV、CVS、PAT呈显著负相,其他微量元素与部分品质性状的参数有着密切相关。     

Study on Analysis Methods for Rock Slope FoundationStability of the Highrise Building

Based on the practical project a study on analysis methods for rock slope foundation stability of highrise-building project criterion transfer coefficient method, rotation limit equilibrium method (Sweden slices method) and finite element method was carried out.The authors found that safety factor of criterion transfer coefficient method is larger than that of rotation limit equilibrium method, but is similar to the results of finite element method. So, when rockslope foundation stability of highrise building is to be analysed,the rotation limit equilibrium method is suggested to use.     

An Analysis of Thick Plates underIn-plane and Transversal Loadings by the BEM

In accordance with the behaviours of thick plates under the in-plane and transversal loadings,and introducing the concept of equivalent load, the coupled equations for the problem have been deduced with the theory of BEM in this paper.Thus a new method is presented for solving the problems of interaction of superstructure and foundation and subsoil,as well as for the problems of the thick plates under the complicated loadings.     

4种微量元素对水稻白叶枯病菌生长的影响

设计０、０．００１、０．０１、０．１、１、５、１０ｍｍｏｌ／Ｌ７种浓度,研究了Ｃｕ、Ｆｅ、Ｚｎ、Ｂ４种微量元素对水稻白叶枯病（Ｘａｎｔｈｏｍｏｎａｓｏ－ｒｙｚａｅｐｖ．ｏｒｙｘａｅ,简称（Ｘｏｏ）生长的影响,结果表明：不同微量元素在不同浓度对Ｘｏｏ生长具有不同的影响效果。Ｃｕ抑制效果最强,在０．１ｍｍｏｌ／Ｌ时即有较强的抑制作用。５ｍｍｏｌ／Ｌ时完全抑制Ｘｏ的生长;其次为Ｆｅ、在０．１和１ｍｍｏｌ／Ｌ时,只对Ｘｏ的生长后期有抑制作用,对生长初期有些刺激作用,但到５ｍｍｏｌ／Ｌ时则有很好的抑制效果;再次为Ｚｎ,在１和５ｍｍｏｌ／Ｌ时,只对Ｘｏ的生长初期略有抑制作用,对生长后期有些刺激作用,高达１０ｍｍｏｌ／Ｌ时才表现明显的抑制作用;Ｂ在低浓度时对Ｘｏ的生长无影响,而在５和１０ｍｍｏｌ／Ｌ时则表现为刺激作用。     

江西省4种水稻土养分限制因子的初步研究

对来自江西农业大学农学实验站、余干县梅岗乡、余干县华林岗乡及星子县廖化镇等４种水稻土,进行实验室分析与吸附试验,并在此基础上确定温室盆栽试验方案,研究４种土壤的养分状况及对高梁生长的影响,为制订水稻施肥方案提供参数依据。结果表明,江西农业大学实验站水稻土主要缺Ｐ,Ｎ,Ｋ,Ｓ,Ｍｏ,Ｚｎ,Ｂ,Ｍｇ等,盆栽不施这些元素,相对产量分别是１７．９％,２９．１％,４１．８％,５３．７％,５８．２％,５８．２     

不同硬化地面类型对城市悬铃木物质循环的影响

研究了城市不同硬化地面类型（水泥地面、水泥砖面和踏实土地面）对悬铃木物质循环、水分循环及营养元素（Ｎ,Ｐ,Ｋ）循环的影响。结果表明：自然降水在城市水泥地面,水泥砖面或坚实的地表上很容易形成较大的地表径流,其中以水泥地面最甚,达４８％;各类型地面对雨水的渗透能力有明显差异,对照（花坛土）最强,为８７６％,踏实土（７２８％）次之,水泥砖面较差（３３％）,水泥地面渗透量接近于零。城市土壤营养元素除Ｋ外,Ｎ,Ｐ含量以踏实土最高,分别为００７７７和００８６６,其次为水泥砖面（００６９９和００５８７）及水泥地面（００５６２和００６３１）;生产力排序为：踏实土＞水泥砖面＞水泥地面。树木对土壤养分的吸收量也呈现相似的趋势,表现为：吸收量越大,理论归还量越大,但由于实际归还量较小,则土壤亏损就较多。     

蒙古栎叶,果实成分分析

通过对蒙古栎叶、果实的成分分析,证实蒙古栎叶中含有糖、蛋白质、脂肪、单宁、叶绿素、灰分、维生素、果胶、１７种氨基酸及２０种微量元素;蒙古栎果实中含有蛋白质、脂肪、淀粉、维生素Ｄ２、１７种氨基酸及２０种微量元素．     

Using the Finite Element Method to Predict the Dispersed Shrinkage and Hot Tearing of the Pump Shell Castings

This paper has simulated numerically the 2D temperature field and stress field of main circle pump shell steel castings of nuclear power plant by finite element method,predicts the dispersed shrinkage,shrindage and hot hearing.The real dissecting pouring castings had the same results as the numerical simulation.At the same time the authors evaluat the molding design of the pump shell castings.     

A Novel Model about Three_Dimensional Infinite Element

A novel model of 3D 12_node infinite element is presented in this paper.The mapping functions in the novel model are clear_cut in the concept and concise in the form.The problems,which emerge in using the infinite element model of the reference, appear in using the novel model.A comparison between the novel model and the infinite element model of the reference is made by computing the examples.The results show that the novel model has the advantages in performance and accuracy.