盐渍化土壤覆土材料理化性状及其对双孢蘑菇生长的影响   总被引：1，自引：0，他引：1  

郭尚  南晓洁  刘秀珍 《食用菌学报》2017,(2):18-23

研究山西省当地盐渍化土壤添加草炭土、醋糟、谷糠或高粱壳配制的不同覆土材料(Ⅰ:66.7%草炭土,33.3%盐渍化土壤;Ⅱ:50%草炭土,50%盐渍化土壤;Ⅲ~Ⅴ:每立方米盐渍化土壤分别添加45kg醋糟、谷糠或高粱)的理化性状,并比较不同覆土材料对双孢蘑菇(Agaricus bisporus)生长的影响,以草炭土为对照。从覆土至第一潮菇采收结束,Ⅰ和Ⅱ覆土电导率呈逐渐上升趋势,而Ⅲ~Ⅴ覆土的电导率则一直保持较高水平,为1427~1980μS/cm,第三潮菇采收时,Ⅰ~Ⅴ覆土电导率均显著下降;覆土第6天开始,Ⅰ~Ⅴ覆土的pH明显高于对照,为7.47~8.47;Ⅰ和Ⅱ覆土处理的发菌天数与对照相同,Ⅲ~Ⅴ覆土处理则比对照延长3d;各处理的第一潮菇和第三潮菇的采收时间均为5d,第二潮菇采收时间各处理间略有差异,但总产量均高于对照,其中以Ⅲ覆土处理产量最高,达21.3kg/m~2。试验结果表明,盐渍化土壤添加草炭土、醋糟、谷糠或高粱壳均可作为生产双孢蘑菇的覆土材料。  相似文献   

进口散装粮食取制样工作发展现状、存在问题及对策     

谌运清  杨万风  杨光  魏厚德  张浩  汪连军  邵沛泽  赵光明  孙翠红  张扬 《植物检疫》2022,(1):49-52

取制样工作是进口粮食检验检疫的重要前提和基础。本文从检验检疫对制取样品的需求出发,系统分析了进口散装粮食取制样工作以人工操作为主的发展现状以及存在的重视程度不够、标准体系不完善、技术设备投入不足、工作效率低、样品代表性差、上下游发展不协同、影响公正执法等诸多问题,提出了通过加快自动化取制样系统的研究和应用等应对措施。  相似文献   

A new furovirus infecting barley in France closely related to the Japanese soil-borne wheat mosaic virus     

Djabbar Hariri  Michel Meyer 《European journal of plant pathology / European Foundation for Plant Pathology》2007,118(1):1-10

In April 2001, stunted barley plants bearing mosaic symptoms were observed in a field in France (Marne Department, 51). Rod-shaped and flexuous particles were visualized by electron microscopy and positive serological reactions were detected by ELISA with Barley yellow mosaic virus (BaYMV) and Soil-borne cereal mosaic virus (SBCMV) polyclonal antisera. The tubular virus which was soil transmissible to barley cv. Esterel was separated from BaYMV by serial mechanical inoculations to barley cv. Esterel. This furo-like virus, in contrast to a French isolate of SBCMV, could be transmitted to Hordeum vulgare, Avena sativa, Beta vulgaris and Datura stramonium. RT-PCR was used to amplify the 3′-terminal 1500 nucleotides of RNA1 and the almost complete sequence of RNA2. Nucleotide and amino acid sequence analyses revealed that the French virus infecting barley is closely related to a Japanese isolate of Soil-borne wheat mosaic virus (SBWMV-JT) which was originally isolated from barley. This French isolate was named SBWMV-Mar. The 3′ UTRs of both RNAs can be folded into tRNA-like structures which are preceded by a predicted upstream pseudoknot domain with seven and four pseudoknots for RNA1 and RNA2, respectively. The four pseudoknots strongly conserved in RNAs 1 and 2 of SBWMV-Mar show strong similarities to those described earlier in SBWMV RNA2 and were also found in the 3′ UTR of Oat golden stripe virus RNAs 1 and 2 and Chinese wheat mosaic virus RNA2. Sequence analyses revealed that the RNAs 2 of SBWMV-Mar and -JT are likely to be the product of a recombination event between the 3′ UTRs of the RNAs 2 of SBWMV and SBCMV. This is the first report of the occurrence of an isolate closely related to SBWMV-JT outside of Japan.  相似文献   

小麦禾谷孢囊线虫湖北群体活动期特性   总被引：6，自引：1，他引：5  

王明祖  黎少波  刘涛玉  陈品三 《植物保护学报》1998,25(1):37-40

小麦播种时定量接种禾谷孢囊线虫（ＣＣＮ）（Ｈｅｔｅｒｏｄｅｒａａｖｅｎａｅ）的孢囊,发芽生根后进行系统观察,结果表明,该线虫在小麦生长季节中完成１代,小麦播种后２５～３５ｄ是２龄幼虫入侵幼根的高峰期,１００～１２０ｄ根内出现３龄幼虫,１１０～１３０ｄ发育成４龄幼虫,１３０～１５０ｄ根表露出白色孢囊（雌虫）。受感染的麦根,侵染点首先变褐,进而肿大,常见分叉增多,形成须根团,ＣＣＮ多居于自然含磷,钾元  相似文献   

粮油食品工艺学课程教学改革探索   总被引：1，自引：1，他引：0  

袁超  杜磊 《农产品加工．学刊》2010,(8):119-120

粮油食品工艺学是一门理论和实践并重的技术课程,通过教学改革与实践,探讨了改进课堂教学和优化实践环节的方法和成效。  相似文献   

粮谷中丙线磷残留分析方法     

王功 《吉林粮食高等专科学校学报》2000,15(4):11-14

对粮谷中丙线磷残留量的检测，采用新法以甲醇提取样品，经液液萃取净化后，再以气相色谱／氮磷检测器测定，测定低限为０．００５μg/ml的浓度范围内，标准曲线呈良好的线性关系γ＝０．９９６，变异系数为５．８％－７．８％，回收率为７２．０％－１００．２％。取代了常规法的繁锁操作程序，使操作步骤更加简便，分析速度快且灵敏度高，适用范围广。  相似文献   

Tolerance of four spring barley (Hordeum vulgare) varieties to weed harrowing     

P K HANSEN  I A RASMUSSEN  N HOLST  & C ANDREASEN† 《Weed Research》2007,47(3):241-251

We investigated the tolerance to weed harrowing of four spring barley varieties and examined the possible interactions between varietal weed suppressive ability and two nutrient levels. Tolerance was defined as the combined effect of crop resistance (ability to resist soil covering) and crop recovery (the ability to recover in terms of yield). The weed harrowing strategy was a combination of one pre‐ and one post‐emergence weed harrowing. In terms of yield, the four varieties responded significantly differently to weed harrowing and the response depended on nutrient level. At the lower nutrient level, weed harrowing caused an increase in yield of 4.4 hkg ha⁻¹ for a strong competitor (cv. Otira), while there was no effect on yield at the higher nutrient level. For a weaker competitor (cv. Brazil), weed harrowing caused no change in yield at the lower nutrient level, whereas yield decreased by 6.0 hkg ha⁻¹ at the higher nutrient level. There were marked differences between the weed suppressive ability of the four varieties when not harrowed, with less pronounced but significant differences when harrowed. Weed harrowing did not change the weed suppressive ability of a variety. Varieties that are tall at post‐emergence harrowing and have increased density after pre‐emergence harrowing, are the ones that benefit most from weed harrowing.  相似文献   

几种粮食皮壳提取物的抗氧化活性测定   总被引：5，自引：0，他引：5  

洪庆慈  吴敏 《粮食储藏》1998,27(5):36-39

用甲醇和石油醚提取几种粮食皮壳，以β-胡萝卜素漂白法测定提取物的抗氧化活性，并且比较它们的提取率和抗氧化指数的高低。  相似文献   

Effect of stage of maturity of whole-crop barley on intake and liveweight gain by dairy steers differing in initial live weight     

B.-O. Rustas  E. Nadeau  S. Johnsson 《Grass and Forage Science》2009,64(3):227-235

The effect of maturity at harvest of whole-crop barley for ensiling on intake and liveweight gain of dairy steers differing in initial live weight (LW) was evaluated in an experiment over two years. Light (104–120 kg) and heavy (402–419 kg) dairy steers were fed diets containing predominantly whole-crop barley silage harvested at the milk stage [dry matter (DM) content of 284 g kg⁻¹ and neutral-detergent fibre (NDF) concentration of 526 g kg⁻¹ DM] or the dough stage of maturity (DM content of 328 g kg⁻¹ and NDF concentration of 445 g kg⁻¹ DM) and supplemented with up to 1 kg of concentrate. Dry matter intake (g kg⁻¹ LW) was higher for whole-crop barley harvested at the dough stage than at the milk stage of maturity and the difference was greater in heavy than in light steers ( P <  0·001). Liveweight gain was higher and feed conversion ratio was lower for dough-stage compared with milk-stage silage ( P  <   0·05) but there was no interaction with size of steer. Whole-crop barley harvested at the dough stage of maturity promoted higher liveweight gains in dairy steers compared with whole-crop barley harvested at the milk stage due to a higher DM intake.  相似文献   

Investigations on resistance of oats to Heterodera avenae: Location of resistance genes     

B. H. Chew  R. Cook  H. Thomas 《Euphytica》1981,30(3):669-673

Summary By using 15 available mono/nullisomic lines of Sun II back ground, the Heterodera avenae resistance gene in Nelson (from Avena sativa CI 3444) and Panema (from A. sterilis I. 376) were located on monosome XV. Genes with smaller effects were located on monosomes VIII and X. The absence of these genes derived from Sun II would increase cyst production on plants lacking major resistance genes.  相似文献