水稻白叶枯病发病中心形成的初步研究

本研究是1960年在望亭苏州专区农科所进行的。该年是水稻白叶枯病发生的轻病年。从5月30日起,分期在双季早稻(有芒早沙粳)、中稻(黄谷早)和晚稻(853)的试验小区,移栽人工接种的病秧共52个点,观察在不同栽培条件下发病中心的形成情况。在水稻生长前期,田间植株分布稀疏,发病条件较差,连续的高温干旱造成病秧早期枯死,使它失去传病作用。病秧移栽到本田以后,最初病害并不向外发展,并且有部分病叶枯死;5月30日和7月10日两期移栽的,由于遇到天旱,病叶枯死尤多。在所有的小区中,病秧附近开始找到新病株     

豫中烟叶生产专用农机的筛选试验

根据豫中烟区烟叶生产农艺要求，对移栽、覆膜、中耕及烟秆拔除等环节的专用农机进行测试，分析比较了各种机械的作业效率、作业能耗、投入资金等，筛选出适应豫中烟区烟叶生产的相关机械设备。     

Improvement of Method in BIN Building Energy Consumption Calculation

The proportion of radiation load through glass windows in building energy analysis is comparatively great;it is regarded as linear relation with temperature in BIN method,which is extremely a rough method.It is not only because the relation between such radiation load and temperature is far from linear relationship,but also there is lack of objective standard for the selection of corresponding representative temperature to the load.To solve this problem,calculating the maximum factor D_(J max) firstly,then get the hourly corresponding relation of load and temperature by multiplying the hourly cool load coefficient.The practical relation of load and temperature could be obtained by counting up the average load to each temperature at each direction;the load calculation method is still simple using a series of statistic data.A comparison has been made between this method and the former one.As it is the real reflection of relation between the temperature and load,the precision of load calculation is enhanced.The process using this method to calculate load for south facing window in Chengdu is given in this paper.     

异丙隆防除麦田看麦娘应用技术研究

近年来,推广应用绿麦隆对防除麦田草害起了一定的积极作用。但是,绿麦隆存在着有药害、药效不稳等弱点。为探寻新的药种,从1985年秋开始,在江苏省植保站的指导下,我们对联邦德国Hoechst公司生产的异丙隆进行了试验,随后,又用吴县农药厂小试合成的异丙隆一起进行试验,现将二年的研究结果报告如下:     

畜禽驱虫新药--伊力佳

伊力佳是一种新型畜禽抗寄生虫药物,主要用于预防和治疗畜禽体内外寄生虫病,对体内各种线虫、体表疥螨、虱、蜱、羊鼻蝇蛆、牛皮蝇等有特效.该产品由北京中农华城科技有限公司(邮码:100094)最新推出.剂型及用法如下:     

A Boundary Element Separation Solution to the Elastic Contact Problems and the Optimal Penalty Factor

In this paper the boundary element separation to the elastic contact problems proposed by Kamiya is improved. It gives another optimal penalty factor to accelerate the iteratively saluting procedure, which makes a theoretical foundation for the application of computers' parallel processing method to reduce the calculation time and memory. A practical example is given to confirm the validity of the present method in comparison with Kamiya method.     

Coupled Fixed Point Theorems for Set-valued Nonexpansive Mappings

In strictly convex Banach spaces, by Set valued mappings being monodromied via the optimal approximation for weakly compact convex set and using contraction mapping sequence to approximate nonexpanding mapping.The author has obtained theorems of coupled fixed point for set valued nonexpansive mappings.     

新源野果林主要气象特征和人工更新集雨防草技术研究

本试验在野果林原生境设置自动气象站,测定主要气象指标,分析温度、降雨和光照等主要气象特征;同时选择野果林原生境阳坡、阴坡和平地3种生境类型试验地,分别铺设园艺地布、黑色地膜和挖鱼鳞坑3种处理,研究其保水和抑制杂草效果。主要得出以下结论:试验区气温从4—7月上升,8月10日后开始逐渐下降,最高温出现在7月下旬—8月上旬;试验期间空气相对湿度呈现不均匀变化,极值出现频率较高;光照从4—6月底逐渐上升,且变化范围较大,7月开始下降;表层土壤温度从5—7月中旬逐渐上升,之后开始下降;降雨主要集中在4—6月,其降雨约占试验期降雨量的65.63%;铺膜和挖鱼鳞坑处理均能不同程度地提高土层0~60 cm的含水量,其中,铺园艺地布、铺黑色地膜、鱼鳞坑处理下0~60 cm平均土壤含水量较CK分别提高20.33%,13.45%,8.58%;3种处理对不同试验地的土壤含水量影响略有差别;阴坡和平地土壤含水量随土壤深度的增加而下降,阳坡则相反;土壤含水量与环境因子密切相关,阳坡与平地土壤含水量与气温、空气相对湿度、土壤温度和降雨量显著相关,阴坡仅与气温、空气相对湿度和降雨量显著相关;铺地布和地膜的防草效果极显著,均达到100%。     

基于WSN的烟田监测关键技术

通过综合利用无线通信技术、嵌入式系统技术、计算机组网技术、节能技术,建立了基于WSN(无线传感器网络)的烟田监测管理系统,对烟田环境、烟叶生长、病虫害、烟叶质量等多种技术指标实时监测,实现了烟叶大田生产、烟田环境控制、水肥一体化控制、病虫害防治的精细化管理。     

巧用信息获益很大

我是农民技术员,平常喜读书刊, 并将其中的技术信息和理论运用于生产实践、生活实际中,使我获益很大。我按《农村新技术》2002年第8期《无公害韭菜夏秋管理技术》一文内容