排序方式: 共有41条查询结果,搜索用时 15 毫秒
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10%氰氟草酯水乳剂防除水稻移栽田禾本科杂草效果研究 总被引:1,自引:0,他引:1
以新型环境友好型的新制剂10%氰氟草酯水乳剂为供试药剂,于2013年在我国具有代表性的5个水稻主产区进行了水稻田除草药效试验。结果表明,10%氰氟草酯水乳剂对水稻田禾本科杂草具有良好的防除效果且对水稻生长安全,推荐使用制剂用药量为50~70mL/667m2(有效成分75~100g ai/hm2)。 相似文献
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Rogéria Beatriz Miz Tatiana Teixeira de Souza-Chies 《Genetic Resources and Crop Evolution》2006,53(3):541-552
The genus Paspalum L. consists of more than 400 species. Around twenty-five informal groups of species are recognized in Paspalum and the Dilatata group is of special interest because its members are excellent potential forage grasses. Seventy-five germplasm
accessions, representing 15 taxa, were analyzed using randomly amplified polymorphic DNA (RAPD). Polymorphisms were observed
with twenty-two primers in the Dilatata group and 16 of those were analyzed. Four hundred and four different RAPD fragments
were generated, resulting in an average of 25.2 bands per primer. Among the 404 markers analyzed, 48 (11.88%) were exclusive
for the P. dilatatum Poir. biotypes, 31 (7.67%) were exclusive to taxa belonging to other groups included in this study, 28 markers (6.93%) were
diagnosed for other species of the Dilatata group and 16 (3.96%), for natural hybrids. Extensive RAPD variation was found
among the species studied. Inter- and intra-taxonomic polymorphisms were detected. A dendrogram based on the RAPD data shows
some clusters corresponding to the same taxa. However, the biotypes of P. dilatatum do not form a cluster. The present work confirms that the RAPD technique can be used to determine genetic relationships between
the taxa belonging to the Dilatata group. 相似文献
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小麦族拟鹅观草属研究进展 总被引:1,自引:0,他引:1
综述了拟鹅观草属植物的分类历史、形态特征和地理分布以及对拟鹅观草属植物的细胞学标记、染色体组分析、分子生物学标记、对赤霉病的抗性等方面的研究进展 相似文献
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Sara Monzerrat Ramírez-Olvera Libia Iris Trejo-Téllez Juan Antonio Pérez-Sato 《Journal of plant nutrition》2013,36(16):1928-1940
AbstractSilicon (Si) is considered a beneficial element for plants due to the far-reaching benefits it confers, including enhanced growth, yield, and crop quality, as well as stress resistance. In this study, we evaluated the effect of Si during germination and initial growth (0.0, 0.5, 1.0, or 1.5?mM Si) and during vegetative growth (0, 1, 2, or 3?mM Si) in rice (Oryza sativa) cv. Morelos A-98. Si did not affect germination but stimulated seedling height, root length, number of roots, as well as fresh and dry biomass weight of shoots and roots during initial growth. During vegetative growth, the application of 3?mM Si significantly increased the chlorophyll a/chlorophyll b ratio, but no major changes were observed either in growth or in concentrations of most nutrients, with the exception of Ca (which increased with 3?mM Si), and B and Zn (which decreased in the presence of Si). In conclusion, applying Si had positive effects during the initial stage of growth, increasing seedling height, root length, root number, and fresh and dry biomass weight. Under our experimental conditions, Si did not affect germination and vegetative growth, but increased Ca concentrations and decreased B and Zn concentrations. 相似文献
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海南禾本科一新记录种,洋野黍(Panicum dichotomiflorum Michx),分布于儋州、陵水、三亚、保亭、琼海。 相似文献
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