共查询到20条相似文献，搜索用时 468 毫秒
1.
2.
明确昭通主栽烤烟品种在不同气象条件下的适应性,根据昭通287个植烟行政村大田期（4—9月）温度、日照和降水气象要素,将昭通植烟区域分为不同气象环境;在不同气象环境下开展烤烟品种的田间试验,以烤烟单位产值和烟叶化学成分TOPSIS得分为主要评价指标,田间农艺性状、病情指数、质量性状为辅助参考指标进行综合评价,筛选不同气象环境下适宜种植烤烟品种。研究表明：昭通植烟区域分为低温干燥多日照、高温干燥多日照、低温湿润多日照、低温湿润寡日照4种气象环境。低温干燥多日照气象环境的‘云烟116’农艺性状、经济性状综合表现较好,‘云烟116’化学成分TOPSIS评价得分最高,‘K326’品种黑胫病显著低于其他4个品种,‘K326’气候性斑点病、TMV、CMV显著高于其他3个品种,其他品种间病害无显著差异;高温干燥多日照气象环境的‘云烟87’和‘云烟116’农艺性状综合表现较好,‘KRK26’‘、云烟87’经济性状综合表现较好,‘云烟87’化学成分TOPSIS评价得分最高;低温湿润多日照气象环境的‘云烟87’和‘K326’农艺性状、经济性状综合表现较好,‘K326’化学成分TOPSIS评价得分最高;低温湿... 相似文献
3.
烤烟新引品种的灰色关联度分析 总被引：3，自引：0，他引：3
为筛选出适合湘东烟区生态条件并达到优质、适产、抗性好的烤烟新品种,利用灰色关联度分析法,对2005-2006年引种浏阳的10个省外烤烟新品种（系）的主要性状进行了综合分析。结果表明,依据品种（系）的灰色关联度顺序进行的综合评估与各品种的实际表现相一致。云烟203的产量、农艺性状、抗病性、品质等综合性状表现最好,其次为云烟202和金海一号,中烟90、中烟201、豫烟3号、V2和NC82表现较差,不适宜在浏阳烟区推广。与等权关联度相比,加权关联度结果与品种（系）的实际表现更为吻合。 相似文献
4.
敌草胺随滴灌水施用对不同品种烟草性状的影响 总被引：2，自引：0，他引：2
为探讨随滴灌水施用敌草胺对不同品种烟草经济性状和农艺性状的影响,选用五个品种烟草:豫烟5号、豫烟7号、中烟100、NC89、KRK28,随滴灌水施用敌草胺除草剂,敌草胺施用量分别为:0 kg/hm2、1.50 kg/hm2、2.25 kg/hm2、3.00 kg/hm2、3.75 kg/hm2。结果表明,不同品种烟草随滴灌水施用敌草胺的处理经济性状烟叶产量和上等烟产量均较对照有所增加,但随着敌草胺施用量的增加,烟叶产量增加的幅度变小,当敌草胺施用量大于3.00 kg/hm2时,烟叶产量增加缓慢。随滴灌水施用敌草胺对不同烟草品种农艺性状的影响不尽相同,但同一烟草品种随滴灌水施用敌草胺的处理与对照比,株高、有效叶片数、叶面积系数均有不同程度增加,大多数差异达到了显著或极显著水平。生产中豫中地区选用表现较好的豫烟5号和KRK28两个烟草品种,随滴灌水施用敌草胺以2.25~3.00 kg/hm2为宜。摘要: 相似文献
5.
6.
采用田间小区试验研究了不同施氯水平对云南烤烟生长、产量和品质的影响。结果表明,施氯水平与烟叶氯含量呈显著正相关（P<0.05）,而与K2O/Cl比值呈显著负相关（P<0.05）。在本试验条件下,在0~112.50kg/hm2的施氯水平范围内,施氯对烟叶具有增产、增加产值和提高中上等烟比例的效应。烤烟产量、产值和中上等烟比例以67.50 kg/hm2的施氯水平为最高,其产值与CK间的差异达到显著水平（P<0.05）;烟叶化学成分含量以施氯水平为22.50kg/hm2时最接近优质烟叶的含量范围且各化学成分协调性较好。因此,从烤烟农艺性状、经济性状和品质综合考虑,云南省优质烤烟合理的施氯水平为22.50~67.50kg/hm2。 相似文献
7.
不同烤烟品种在云南景东的适应性研究 总被引：4，自引：2，他引：2
为筛选出适宜云南景东烟区种植的烤烟品种,将4个品种‘云烟85’、‘云烟87’、‘云烟97’、‘KRK26’,以当地主栽品种‘K326’为对照进行同田对比试验。结果表明：（1）‘KRK26’总体表现为苗期、大田期长势较强,经济性状较好,钾含量较,植株较高、节距较稀、叶片较宽、现蕾较晚、大田生育期较长、抗倒伏和抗黑胫病的能力较弱、原烟叶片偏薄等特点。（2）‘云烟87’综合经济性状最好,产量、产值最高,级指、均价、上等烟比例较高。 相似文献
8.
为深入了解植物生长调节剂对烤烟生长发育的影响,以云烟87为试验材料,采用大田试验的方法,研究微生物菌剂、生根粉和表油菜素内酯对烤烟农艺性状、抗氧化酶、多酚氧化酶、根系活力以及烤后烟叶化学成分的影响。结果表明,施用植物生长调节剂对烟株农艺性状、根系活力、过氧化指标相关酶类和烟叶化学成分均有影响。随着烟株的生长,各处理过氧化物酶（POD）活性逐渐升高,多酚氧化酶（PPO）活性呈现降-升-降的趋势。与对照和施用表油菜素内酯相比,施用微生物菌剂灌根和生根粉浸根提高了烤烟的株高、茎围、最大叶长、最大叶宽和有效叶片数;在移栽后45d提高了POD和PPO活性,增强了根系活力,使烤后烟叶化学成分更加协调。综合来看,施用微生物菌剂灌根和生根粉浸根能够改善烤烟的生长发育情况,提高烟叶品质。 相似文献
9.
10.
烤烟新品种遵烟6号的特性研究 总被引：1，自引：1，他引：0
遵烟6号是贵州省遵义市遵义县从红花大金元品种中获得的自然变异株,经多年系统选育而成,该品种叶片形态特征与红花大金元相似,遗传性状稳定,在株高、叶数、茎围、节距等主要农艺性状上有明显差异;经贵州省烟草科学研究所抗性鉴定和田间多点试验结果表明,遵烟6号中抗青枯病,感烟草花叶病,抗气候性斑点病的能力优于对照;主要经济性状产量、产值和均价均优于对照;各项化学成分指标均在优质烟叶适宜范围内,主要化学成分协调;初烤烟叶感官质量评吸与对照K326相当。 相似文献
11.
Biological Activity and Quantification of Suspected Allelochemicals from Alfalfa Plant Parts 总被引：7，自引：0，他引：7
Autotoxicity restricts reseeding of alfalfa (Medicago sativa L.) after alfalfa until autotoxic chemical(s) breaks down or is dispersed into external environments. A series of aqueous extracts from leaves, stems, roots and seeds of alfalfa ‘Vernal’ were bioassayed against alfalfa seedlings of the same cultivar to determine their autotoxicity. The highest inhibition was found in the extracts from the leaves. Extracts at 40 g dry tissue l?1 from alfalfa leaves were 15.4, 17.5 and 28.7 times more toxic to alfalfa root growth than were those from roots, stems and seeds, respectively. A high‐performance liquid chromatography (HPLC) analysis with nine standard compounds showed that the concentrations and compositions of allelopathic compounds depended on the plant parts. In leaf extracts that showed the most inhibitory effect on root growth, the highest amounts of allelochemicals were detected. Among nine phenolic compounds assayed for their phytotoxicity on root growth of alfalfa, coumarin, trans‐cinnamic acid and o‐coumaric acid at 10?3 m were most inhibitory. The type and amount of causative allelochemicals found in alfalfa plant parts were highly correlated with the results of the bioassay, indicating that the autotoxic effects of alfalfa plant parts significantly differed. 相似文献
12.
C. J. Spurr D. A. Fulton P. H. Brown R. J. Clark 《Journal of Agronomy and Crop Science》2002,188(4):275-280
Development of onion (Allium cepa L., cv. ‘Early Cream Gold’) seed under cool climate conditions in Tasmania, Australia occurred over a longer duration than previously reported, but similar patterns of change in yield components were recorded. In contrast to previous studies, umbel moisture content declined from 85 to 67 % over 57 days while seed moisture content decreased from 85 to 31 %. Seed yield continued to increase over the duration of crop development, with increasing seed weight compensating for seed loss resulting from capsule dehiscence in the later stages of maturation. Germination percentage was high and did not vary significantly from 53 to 77 days after full bloom (DAF), but mean germination time declined and uniformity of germination increased significantly over the same time period. The percentage abnormal seedlings declined with later harvest date, resulting in highest seed quality at 77 DAF. The results of this study suggest that the decision to harvest cool climate onion seed crops before capsule dehiscence will result in a loss of potential seed yield and quality. 相似文献
13.
G. H. Kroon 《Euphytica》1994,76(1-2):125-125
Summary
K x vadensis is a hybrid of K. blossfeldiana and K. marmorata obtained after doubling the number of chromosomes. 相似文献
14.
Jens Jensen 《Euphytica》1979,28(1):47-56
Summary The high-lysine gene in Risø mutant 1508 conditions an increased lysine content in the endosperm via a changed protein composition, a decreased seed size, and several other characters of the seed. The designation lys3a, lys3b, and lys3c, is proposed for the allelic high-lysine genes in three Risø mutants, nos 1508, 18, and 19. Linkage studies with translocations locate the lys3 locus in the centromere region of chromosome 7. A linkage study involving the loci lys3 and ddt (resistance to DDT) together with the marker loci fs (fragile stem), s (short rachilla hairs), and r (smooth awn) show that the order of the five loci on chromosome 7 from the long to the short chromosome arm is r, s, fs, lys3, ddt. The distance from locus r to locus ddt is about 100 centimorgans. 相似文献
15.
Hongyan WEI Jian ZHOU Jinguang LU Jingzheng SONG Qiongxi YU Zhihong JIANG 《Medicinal Plant》2019,(6):27-29
[Objectives]This study aimed to establish a QAMS(quantitative analysis of multi-components by single-marker)method for simultaneous determination of four phenol... 相似文献
16.
Summary Avoidance of rust fungi that was based on poor appressorium induction was previously found in Hordeum chilense. In the present study 95 accessions of Triticeae were screened for avoidance of Puccinia hordei. The percentage of appressorium formation per germinated spore ranged from 6 to 90%. On none of the 41 accessions of Aegilops, Agropyron, Elymus, Secale, Thinopyrum or Triticum studied was the rate of appressorium formation lower than 25%. Lower rates of appressorium formation were, however, found on accessions of wild barley species Hordeum brachyantherum, H. marinum, H. parodii and H. secalinum. Its implications in cereal breeding are discussed. 相似文献
17.
Summary Reactions of 13 grasses to Meloidogyne naasi varied with species; ryegrasses, fescues and their hybrids were generally susceptible and cocksfoot and timothy resistant. Marked variation in host resistance levels occurred between genotypes within cultivars.Selection of single plants, followed by tests on replicate tillers, identified resistant and susceptible genotypes in both Italian and perennial ryegrass cultivars. Resistant plants had few nematode-induced galls and fewer females and eggs than susceptibles. There was more or less continuous variation, with many genotypes intermediate between extremes of resistance and susceptibility. Selected resistant and susceptible genotypes are of use in assessing variation in nematode populations and as controls for breeding and selection programmes. 相似文献
18.
W. Erskine M. Tufail A. Russell M. C. Tyagi M. M. Rahman M. C. Saxena 《Euphytica》1993,73(1-2):127-135
Lentil production is limited by lack of moisture and unfavorable temperatures throughout its distribution. Waterlogging and salinity are only locally important. Progress has been made in breeding for tolerance to drought through selection for an appropriate phenology and increased water use efficiency and in breeding for winter hardiness through selection for cold tolerance.The diseases rust, vascular wilt, and Ascochyta blight, caused by Uromyces viciae-fabae, Fusarium oxysporum f. sp. lentis, and Ascochyta fabae f. sp. lentis, respectively, are the key fungal pathogens of lentil. Cultivars with resistance to rust and Ascochyta blight have been released in several countries and resistant sources to vascular wilt are being exploited. Sources of resistance to several other fungal and viral diseases of regional importance are known. In contrast, although the pea leaf weevil (Sitona spp.) and the parasitic weed broomrape (Orobanche spp.), and to a lesser extent the cyst nematode (Heterodera ciceri), are significant yield reducers of lentil, no sources of resistance to these biotic stresses have been found. Directions for future research in lentil on both biotic and abiotic stresses are discussed. 相似文献
19.
D. A. Bond G. J. Jellis G. G. Rowland J. Le Guen L. D. Robertson S. A. Khalil L. Li-Juan 《Euphytica》1993,73(1-2):151-166
Progress is being made, mainly by ICARDA but also elsewhere, in breeding for resistance to Botrytis, AScochyta, Uromyces, and Orobanche; and some lines have resistance to more than one pathogen. The strategy is to extend multiple resistance but also to seek new and durable forms of resistance. Internationally coordinated programs are needed to maintain the momentum of this work.Tolerance of abiotic stresses leads to types suited to dry or cold environments rather than broad adaptability, but in this cross-pollinated species, the more hybrid vigor expressed by a cultivar, the more it is likely to tolerate various stresses. 相似文献
20.
Chunli TANG Fengxian ZHAO Hongxia CHEN Jiabao MA Jiangcun WEI Meiyan QIU Zhen XIE 《Medicinal Plant》2019,(6):60-65
[Objectives]To optimize the water extraction process of Chinese Herbal Compound Man Gan Ning and establish a method for its extraction and content determination... 相似文献