西双版纳辣木生长发育及物候观测初报   总被引：5，自引：0，他引：5  

杨焱  龙继明  刘昌芬 《热带农业科技》2006,29(3):6-7,40

在西双版纳栽培条件下,辣木生长发育快,定植当年即可开花结果,而且一年四季均可开花结果;每年雨季(5～9月)为生长高峰期;花量大但座果率平均为3%;豆荚长度多为30～50cm,占豆荚总数的73%,其种子数占种子总数的75%;败育率平均15%。不同品种其生长量有较大差异。  相似文献   

金山葵缺素症研究   总被引：2，自引：0，他引：2  

隆学武  杨希  黄勇  曾华浩  范宏达 《福建林业科技》2002,29(2):54-55,64

选用Machlis营养配方 ,用砂基培养法方式 ,采用加入诊断法 ,探讨金山葵矿质元素缺乏症症状。并总结了金山葵缺氮、缺磷、缺钾、缺镁、缺锰和缺铁的缺素症  相似文献   

桤木优树选择研究   总被引：10，自引：3，他引：10  

吴际友  龙应忠  童方平  程勇  易星星  潘新军 《湖南林业科技》2004,31(6):10-12

论述了桤木优树选择应遵循的基本原则，包括目标性原则、一致性原则、优中选优原则等。根据这些原则，针对桤木短周期工业用材林(纸浆材)这一选择目标，提出了桤木优树选择的方法，包括五株优势木比较法、绝对生长量法及标准差法，同时提出了相应的选择标准。  相似文献   

Theory Model of Viscoelasticity of Hepatocellullar Carcinoma Cells by Micropipette Aspiration Method     

SONG Guan bin  ZHAO Yan hu  LONG Mian  WU Ze zhi  WANG Yuan liang  WANG Bo chu  CAI Shao xi 《保鲜与加工》2003,(4):104-107111

The mechanical properties of cells are relation to their structure and function. Viscoelasticity is a kind of essence properties of cells and an important researching contents in the field of cellular mechanics. Micropipette aspiration technology is an advanced artifice on the level of single cell to study the mechanics of cells. In order to investigate the theory and method in researching mechanical properties of hepatocellullar carcinoma cells with micropipette aspiration, hepatocellullar carcinoma cells was regarded as an even linear solid and the standard linear solid viscoelastic model was chosen to describe viscoelasticity of hepatocellullar carcinoma cells, theory model of viscoelasticity of hepatocellullar carcinoma cells by micropipette aspiration was established according to the related papers, it will provide methodology reference for studies in this fields.  相似文献   

玉米马铃薯间作对根际微生物群落结构和多样性的影响   总被引：6，自引：0，他引：6  

覃潇敏  郑毅  汤利  龙光强 《作物学报》2015,41(6):919-928

设置3个种植处理(玉米单作、马铃薯单作和玉米马铃薯间作),通过田间试验和盆栽试验,采用Biolog技术分析了玉米马铃薯根际微生物的群落结构和功能多样性的变化情况。结果表明,与单作相比,间作处理使玉米和马铃薯根际微生物对31种碳源的平均利用率(AWCD)分别增加17.36%、7.38%和3.76%、32.21%,其中间作马铃薯的AWCD值最高,单作玉米最低。间作玉米和间作马铃薯根际微生物群落的Shannon指数(H)、Simpson指数(D)、均匀度指数(E)、丰富度指数(S)均高于单作,但在间作和单作之间差异不显著。根际微生物对6类碳源的利用强度以糖类、羧酸类和氨基酸最高,并存在一定的差异。主成分和聚类分析表明,玉米与马铃薯间作改变了根际微生物的群落组成,糖类、羧酸类和氨基酸类碳源是区分单间作处理差异的敏感碳源。说明玉米马铃薯间作改变了根际微生物群落结构组成,提高了根际微生物群落功能多样性。  相似文献   

Influence of Temperatures on Compressive Deformation Behavior of Magnesium Casting Ingots     

CAO Han-xue  LONG Si-yuan  LIAO Hui-min  DENG Yong-tao 《保鲜与加工》2005,(12):9

  相似文献   

Frequency Shift of Proca Light Caused by a Single Polarized Linearized Gravitational Wave     

SHI Dong-ping  LONG Bing-wei  WU Zhang-han 《保鲜与加工》2005,(7):129-132

When light spreads in gravitational wave, its frequency is changed. Usually considering frequency gravitational shift, the rest mass of the photon is neglected. According to Proca equations of weight electromagnetic wave the authors investigate the Frequency shift of Proca light. The results of numerical estimation show that frequency shift of the photon has a small change when considering the rest mass of the photon and it is not detected at present experimental condition.  相似文献   

Research on the Performance of Indoor Air-cooled Heat Pump at Suummer Situationr     

WANG Yong  LONG En-shen  CHEN Jin-hu  WEI Qiang 《保鲜与加工》2004,(6):67-71

Based on the contrast experiment, the condition of air-cooled heat pump operating indoors is analyzed in this paper.The operating performance corresponding to such conditions is gained.The ventilation condition of stable operation for air-cooled heat pump is found.At the same time, the experimental results based on actual work are proved. indoors; air-cooled heat pump; ventilation   相似文献   

Investigate to Water Resource and the Dispatch to Water Capacity in LIJIANG     

YU Ze-bin  LONG Teng-rui  SHI Lian  WANG Dun-qiu 《保鲜与加工》2004,(7):118-121

The tremendous seasonal variation of rainfall and the relative little dispose capacity of sewage are the main reason of the lack of water quantity and the contaminate of water quality in low water season in LIJIANG. Adjusting water quantity is an important measure to resolve the problem. So, the author does an investigation on water resource of LIJIANG, calculates upper-water supply and requires equation. As a result, in the condition of no water adjust, and if in the extraordinary year of the lack of water quantity, the water flow will fade in 2010, and the demand of water quantity of 30 m~3/s in the season of the lack of water will not be satisfied. Based on the actuality of water resource, the thesis introduces the project of mending water reservoir to LIJIANG,analyzes its feasibility in the respect of technique and financial condition,brings forward major problem of the project. The result proves the benefit of the project in the field of environment,economy society is very prominent, and the project is an engineering to realize water resource of LIJIANG reasonable utilize; for the reason to guarantee this project to bring into play its function,it is time to carry out integrate management to water resource and water environment in LIJIANG valley.  相似文献   

Finite element analysis of the LX150 motorcycle crankcase box     

WU Guo-yang  LONG Si-yuan  YANG Zhi-gang  CHEN Xiao-an  WANG Yong-gang  WU Li-hong ty  Chongqing  Chin  .College of Mechanical Engineering  Chongqing University  Chongqing  Chin 《保鲜与加工》2004,(8):11-14

The wall thickness and strengthen muscle of motorcycle crankcase box influences its structure intensity directly. The static model of crankcase box of a magnesium alloy material is established by finite element method. The structure is analyzed with I-DEAS, the reason the crankcase box is crazed is pointed out. The structure is rebuilt, the intensity is increased remarkablely, the cost of manufacture is reduced largely. And the capability of a originally material, i.e. aluminium alloy is validated.  相似文献