下部烟叶烘烤工艺研究   总被引：2，自引：0，他引：2  

刘清华  高宝昌 《河南农业科学》1998,(4):8-11

对下部烟叶烘烤研究结果表明，在３８℃使底棚烟叶变黄６成，然后升温到４１℃完成变黄，再以２小时１℃的速度升温定色，能有效地保证和提高烟叶的内在和外观品质  相似文献   

生物钾肥对烤烟生产的影响   总被引：9，自引：2，他引：7  

朴世领  李虎林 《延边大学农学学报》1997,19(2):94-97

通过两年的实验结果表明：在烤烟生产中，用生物钾肥代替部分工业钾肥是可行的，并且菌肥的效果最佳，其次为菌剂。生产上最佳配比组合是以菌肥代替20％的氧化钾，在烟草生产上效果最佳。  相似文献   

微肥亚硒酸钠对白肋烟TSNA水平的影响   总被引：1，自引：1，他引：0  

汪安云  张树堂  柴家荣  祝明亮  杨雪彪  武锦坤 《安徽农业科学》2004,32(3):525-526,533

对白肋烟品种TN86进行喷施不同浓度的微肥亚硒酸钠 ,然后分别进行杀青烘干和自然晾晒调制处理 ,最后分析测定其不同部位叶片的TSNA含量。结果表明 :自然晾晒调制处理的叶片TSNA含量远高于杀青烘干调制处理的叶片 ;对于自然晾晒调制处理的叶片 ,当微肥浓度为 10 μg/ml时 ,其上、中、下部烟叶的TSNA水平均有所提高 ,随着微肥浓度的增加 ,其TSNA水平逐渐降低 ;当微肥浓度增加到 40 μg/ml时 ,其TSNA水平达到最低 ,以后逐渐平稳。对于经过杀青烘干处理的叶片 ,当微肥浓度为 10 μg/ml时上、中部白肋烟烟叶的总TSNA含量分别降低了 5 2 %和 3 7% ,随着微肥浓度的提高 ,变化趋于平缓 ;对下部叶来说 ,喷施微肥浓度在 10～ 40 μg/ml范围内 ,其TSNA总量呈显著上升趋势 ;当喷施浓度≥ 40 μg/ml时 ,TSNA含量又逐步降低。  相似文献   

烤烟中氯与其它主要营养元素的关系(综述)     

温明霞  易时来  李学平  石孝均  关博谦 《勤云标准版测试》2004,(5)

综述了烤烟中的氯与其它主要营养元素之间相互关系的研究进展:氯促进烤烟对K 、Ca2 、Mg2 等阳离子的吸收,抑制NO3-、H2PO4-、SO42-等阴离子的吸收,并对今后的研究方向进行了展望。  相似文献   

转基因植物对环境生态平衡的影响   总被引：1，自引：0，他引：1  

王伟伟 《林业调查规划》2007,32(4):61-65

根据近年来国内外关于转基因植物的研究进展,结合维持生态平衡的3个主要因素,即物种组成、环境因素及信息系统,论述转基因植物对环境生态平衡的影响.  相似文献   

Assessment of Rhizospheric Microorganisms of Transgenic Populus tomentosa with Cowpea Trypsin Inhibitor (CpTI) Gene     

Zhang Qian  Zhang Zhi-yi  Lin Shan-zhi  Lin Yuan-Zhen  Yang Le 《中国林学(英文版)》2005,7(3):28-34

To have a preliminary insight into biosafety of genetically transformed hybrid triploid poplars (Populus tomentosa × P. bolleana) × P. tomentosa with the cowpea trypsin inhibitor (CpTI) gene, two layers of rhizospheric soil (from 0 to 20 cm deep and from 20 to 40 cm deep, respectively) were collected for microorganism culture, counting assay and PCR analysis to assess the poten-tial impact of transgenic poplars on non-target microorganism population and transgene dispersal. When the same soil layer of suspension stock solution was diluted at both 1:1 000 and 1:10 000 rates, there were no significant differences in bacterium colony numbers between the inoculation plates of both transgenic and non-transgenic poplars. The uniform results were revealed for both soil layer suspension solutions of identical poplars at both dilution rates except for non-transgenic poplars at 1:10 000 dilution rates from the same type of soil. No significant variation in morphology of both Gram-positive and Gram-negative bacteria was observed under the microscope. The potential transgene dispersal from root exudates or fallen leaves to non-target microbes was repudiated by PCR analysis, in which no CpTI gene specific DNA band was amplified for 15 sites of transgenic rhizospheric soil samples. It can be concluded that transgenic poplar with the CpTI gene has no severe impact on rhizospheric microorganisms and is tentatively safe to surrounding soil micro-ecosystem.  相似文献   

Molecular Cloning of a Cellulose Synthase Gene PtoCesA1 from Populus tomentosa and Its Genetic Transformation in Tobacco     

Li Chun-xiu Zhang Shou-gong Wang Yang-dong Shi Sheng-qing Qi Li-wang 《中国林学(英文版)》2005,7(4):5-10

A 3 125 bp cellulose synthase gene, PtoCesA1, which has a 98% identity to PtrCesA1 from Populus tremuloides, was cloned from cDNA prepared from secondary xylem of P tomentosa. Four anti-expression vectors with different fragments of PtoCesAl, named as pBIPF, pBICC1, pBIPR and pBIBR, were constructed. Some traits of transformed tobacco of pBICC1, pBIPR and pBIBR differed from wild types, such as small leaves, ＂dwarf＂ phenotype and thinner xylem and fiber cell walls than wild plants consistent with a loss of cellulose. It indicated that the growth of transgenic tobacco was restrained by the expression of anti-PtoCesA1. Transgenic tobacco was obtained and the contents of cellulose and lignin were analyzed as well as the width and length of fiber cells, and xylem thickness for both transgenic and control plants. Transformed tobacco showed a different phenotype from control plants and it implied that PtoCesA1 was essential for the cellulose biosynthesis in poplar stems.  相似文献   

转基因741杨对舞毒蛾不同龄期幼虫的抗性研究   总被引：4，自引：0，他引：4  

高宝嘉  胡海燕  王进茂  梁海永  段文倩 《河北林果研究》2002,17(2):159-162

用7种不同系号的转抗741叶片为材料，对舞毒蛾幼虫进行逐龄分别饲养，系统测定各系号抗虫杨叶片对舞毒蛾不同龄期幼虫的死亡率，体重增长速率，发育速率的影响。结果表明：7种抗虫杨叶片对1龄幼虫均表现出较高的毒杀作用，其中处理3d的死亡率均达到35％，处理5d死亡率达80％。对2，3龄幼虫除具有一定的毒杀作用外，主要表现为对其生长发育的抑制作用，影响其正常的取食，降低体重增长速率和减慢发育速率。  相似文献   

转多基因库安托杨非靶目标材性性状分析          下载免费PDF全文

朱文旭  黄秦军  褚延广  丁昌俊  姜岳忠  董玉峰  苏晓华 《林业科学研究》2015,28(4):593-596

In this study, the transgenic poplar (Populus × euramericana‘Guariento’) harboring five exogenous genes (SacB, Vgb, BtCry3A, OC-I and JERF36^#) and the control plants were selected, comparing the wood property variation of 5-year-old trees, and trying to understand whether the transgenic of exogenous genes produce unintended effects. The results showed that the transgenic of exogenous genes caused a wide range of variation in non-target wood properties, the variations were found not only between transgenic and wild-type lines, but also among transgenic lines. Compared with the control, the transgenic lines, the contents of holocellulose and cellulose increased, the total lignin and acid soluble lignin decreased, the fiber length, the fiber width, the microfibril angle and the acid insoluble lignin varied uncertainly. It is concluded that the introduced exogenous gene could generate unintended effects on corresponding non-target target traits.  相似文献   

灌水次数与施氮量对香料烟品质的影响     

张红梅  魏团仁  苏泽春  陈于福 《热带农业科技》2006,29(4):27-29

在云南保山潞江坝对香料烟不同灌水次数和施氮水平对烟叶品质和有关经济指标影响的试验表明,以烟苗移栽后25d第1次灌水,移栽50d后第2次灌水,施纯氮60kg/hm2的处理烟叶品质和综合经济指标最好。  相似文献