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烟草催芽包衣种生理生化指标测定及根系发育状况研究 总被引:4,自引:0,他引:4
对萌发时催芽与未催芽烟草裸种浸提液的电导率和相关酶活性进行了测定 ,并对催芽包衣种和普通包衣种成苗特征、根系发育状况进行了调查。结果表明 ,与未催芽的裸种相比 ,催芽烟草裸种的浸提液电导率明显降低 ,种子活力和相关酶活性提高。与普通包衣种相比 ,催芽包衣种成苗时烟苗根系活力、干物质的量和根冠比均有较大幅度提高 ,侧根数目增加 ,同时叶片的叶绿素含量、过氧化物酶和硝酸还原酶活性明显升高。因此 ,催芽包衣的种子活力较高 ,所育烟苗根系发达 ,素质良好。 相似文献
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不同丸化包衣种对烟苗素质的影响 总被引:1,自引:0,他引:1
第二代包衣种较第一代包衣种抗压强度提高1.5倍,裂解速度提高3倍;与第一代包衣种和裸种(对照)相比,出苗率分别提高23.6%、28.5%;出苗整齐度提高50.7%和53.0%;七叶一心时烟苗茎粗分别增加7.8%、3.8%,侧根数分别增加14.9%、9.1%;单株地上部干重分别提高11.6%、29.7%,地下部干重分别提高37.8%、34.8%。 相似文献
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离子注入对烟草种子萌发及苗期生长发育的影响 总被引:12,自引:2,他引:12
用不同剂量的氮离子注入NC89烟草种子,研究其对种子萌发和苗期生长发育的影响。结果表明,离子注入不同剂量对烟草种子萌发和苗期生长有不同的作用。在20~120次范围内可提高种子前期萌发,促进子叶平展和胚根生长,提高幼苗生理活性,增加干物质积累,其中以80次最佳;对烟苗叶片长、宽、茎粗的增长及干物质积累都有促进作用,与对照比较都达到显著水平,有些达到极显著水平;对烟苗出叶速率、根长、根幅、侧根数的影响,多数处理有促进作用,其中表现较好的处理有160次,40次,80次。 相似文献
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The seed quality of diverse aromatic rice landraces is of great importance in tropical and sub-tropical humid environment. The changes in seed behaviour under different storage methods and durations need to be studied to conserve the seeds in better way for sowing viable and healthy seeds toward greater rice production with premium quality. Three experiments were conducted (1) to find out distinguishable seed morphological traits and (2) to understand the effects of storage duration, container and environment on germination and seedling vigour of non-Basmati aromatic rice during 6-month period (December to June) before next growing season. Among 16 aromatic rice cultivars, genetic variations in seed length (4.8–7.5 mm), seed width (2.1–3.2 mm), test weight (10.0–15.6 g), lemma and palea colour (golden-yellow, straw-yellow, black, brownish-red, purple spot at tip on straw background) were noted. Germination rate was steadily increased up to 4 months of post-harvest storage (93.0%, CV 4.9%) and attained a plateau for next 2 months. Four landraces viz. Gandheswari, Kalonunia, Kaminibhog and Radhunipagal remained dormant up to 2 months; while Mohanbhog, Gandhamalati, Gopalbhog and Badshabhog had better germinability throughout normal storage period. Among four containers, jute-made gunny bag and earthen pot were found suitable for higher germination rate (82.7–85.0%) as well as to produce better seedlings of Radhunipagal rice stored for 6 months compared to non-biodegradable material made containers (galvanized iron bin and polypropylene bag). Besides, the use of neem leaf could favour germination speed (39.5 vs 36.1%) and seedling vigour of Radhunipagal rice than no neem leaf treatment. Storage at low temperature (8±2 °C) for 6 months appeared better for greater seedling length (20.8 vs 19.3 cm) and vigour index (1897 vs 1733) of Lal Badshabhog rice compared to ambient condition (28±4 °C). 相似文献
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烟草种子表面微生物电镜观察与计数 总被引:5,自引:0,他引:5
本研究对45个烟草品种的种子表面微生物进行了扫描电镜观察,结果表明:93.3%被观察品种的种子表面有微生物着生,其中包括某些多细胞丝状微生物,单细胞杆状与球状微生物。利用改进后的分离方法,对我国10个烟草生产主要推广品种进行了种子表面微生物计数,结果表明,每克供试品种的烟草种子细菌数量平均为2.3×105~1.9×107个,放线菌数量为3.9×101~4.1×102个,真菌数量为2.0×103~3.8×104个。 相似文献
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论“反吸烟运动”在烟草科技进步中的地位和作用 总被引:1,自引:0,他引:1
本世纪50年代以来,反吸烟运动的不断高涨对烟草业的生产和发展产生了巨大影响,为此,烟草业着力于降低烟草中的有害物质,烟草科技突飞猛进。本文对此进行了深入研究,并对烟草未来的发展走向作了宏观的预测和展望。 相似文献
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