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Daniela Baldez Vidal ;Isis Leite Andrade ;Eusinia Louzada Pereira Andrade ;Marcelo Schramm Mielke 《林业研究》2014,25(4):903-908
We analyzed the tolerance of Copaifera lucens seeds to sub- mersion in water to assess the use of this species for direct seeding in riparian forest restoration programs. Seeds were submerged in water for 2, 4, 8, 16 and 32 days or not submerged (control = 0 days of submer- gence). For the control and at the end of each period of submersion, germination and seedling vigor tests were carried out. For germination tests, seeds were sown in plastic pots containing sand and kept in labora- tory conditions. The percentage of seed germination, the germination rate and the average germination time were analyzed. For seedlings, total biomass, leaf area, leaf mass per area and leaf area ratio were analyzed. Submersion time drastically affected the dissolved oxygen content and seed germination. Between 4 and 8 days of submersion there was a de- crease from 83.8% to 15.6% in the germination percentage. No seed germination occurred after 16 days of submersion. Although there was a significant decrease in the percentage of seed germination between 4 and 8 days of submersion, seedling vigor was not affected. Seeds of this species were partially tolerant to submersion in water, suggesting that C. lucens is a promising species for direct seeding in riparian forest restora- tion projects. 相似文献
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2种化学药剂处理对老化桑种子发芽力及种子活力的影响 总被引:1,自引:0,他引:1
以自然老化桑种子为材料,用2种不同浓度的化学试剂:赤霉素( GA3)、抗坏血酸(ASA)浸种处理,对桑种子的发芽力、α-淀粉酶活力以及幼叶中可溶性蛋白含量、可溶性糖含量和丙二醛(MDA)含量进行了分析.结果表明,2种试剂对桑种子萌发均有一定的促进作用,而且不同试剂对种子萌发的影响与使用的浓度密切相关.ASA处理以500 mg/L效果最好,GA3处理以50 mg/L效果最好.其中500 mg/L ASA处理种子发芽率、发芽指数、α-淀粉酶活力、桑幼叶中可溶性蛋白含量、可溶性糖含量比对照分别提高了13.87%、16.18%、55.68%、17.20%和30.53%;50 mg/L GA3处理分别比对照提高了4.63%、14.72%、28.41%、12.45%和12.98%;丙二醛含量500 mg/L ASA处理和50mg/L GA3处理分别比对照下降了56.32%和37.62%.500 mg/L ASA处理下,除α-淀粉酶活力外,其余指标各处理间差异均达显著或极显著水平;50 mg/L GA3处理则表现为除发芽率和可溶性蛋白含量外,其余指标各处理间均达到显著或极显著水平.综合分析可知,500 mg/L ASA的处理效果比50 mg/L GA3好. 相似文献
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为拓宽放线菌生物活性物质的功能应用,用不同浓度的蚯蚓内附生放线菌AEC 2代谢物处理桑种子,探讨其对桑种子萌发和幼苗生长的影响.结果表明:放线菌AEC 2代谢物能够提高桑种子的质量和品质,提高种子发芽率和发芽势,缩短发芽时间,提高胚轴/胚根长,且浓度越低效应越好,但差异不显著.AEC 2代谢物能够显著提高幼苗可溶性蛋白含量、促进种子中贮存物快速转化为可溶性糖类、提高氧化酶活性,平衡氧化和抗氧化水平,使幼苗的新陈代谢水平处于活跃状态.在试验浓度范围内以0.031 25 mg/ml效果最佳. 相似文献
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1、土地选择 一般土壤均可种植.但选择疏松、肥沃、能排能灌、阳光充足的沙壤土是获得快速高产、年年稳产的首要条件. 2、整地、备足底肥 相似文献
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桑种子生产期正值广东的春雨绵绵季节,严重影响种子的及时干燥和发芽率。采用室内干燥处理方法,经过高速离心脱水脱胶,适宜的干燥温度与时间和合理的干燥室设计,可以及时干燥桑种子,并能保证桑种子的发芽率且色泽光鲜一致,呈棕黄色,观感好。经多年生产实践证明,方法可行,效果良好。 相似文献
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