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种子丸粒化是将杀虫剂、杀菌剂、肥料、植物生长调节剂、保水剂以及固(液)体辅料等材料通过机械加工,有序分层地包敷到种子上,制成外表光滑、大小均匀、颗粒增大,形状像"丸粒"的种子处理,是内蒙古自治区重点科技成果推广应用项目。该技术的应用与推广,促进了巴彦淖尔市生态效益、经济效益、社会效益的大发展。 相似文献
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植物繁殖及更新最难度过的时期就是种子萌发和萌发后的幼苗生长期。在此期间,植物可持续供应水分,是植物成活的关键,水成为恢复植被的限制因子。强吸水抗旱(丸化)技术利用种子包衣剂中的高分子吸水树脂,解决了干旱、半干旱地区植物种子萌发和幼苗生长期水分需求问题,而且通过丸化技术解决了干旱、半干旱地区牧草种植、退耕还林(草)人工造林,种植时对水、肥、根瘤菌、农药、生长促进剂等的综合需要问题。 相似文献
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种子大粒化技术是将小粒种子或表面性状不规则的种子,通过制丸机使包衣剂包敷在种子表面,在不改变原种子生物学特性的基础上,形成具有一定尺寸、一定强度的球形颗粒,达到小粒种子大粒化, 相似文献
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林木种子丸直播造林成本低,质量好,进度快,避免了植苗造林过程中发生的窝根、露根、悬空、歪苗等问题造成的危害,相对提高了造林质量。同时在种子成苗和幼苗保存率方面均优于裸体种子直播造林。 相似文献
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以田间调查数据为基本资料,对极耐湿的水紫树种子进行沙藏和冷藏保存,分别于3月17日、4月1日播种,对其播种苗的发芽、幼苗生长进行统计分析。结果表明:冷藏保存的种子发芽慢,持续时间长,而沙藏保存的种子发芽相对较快,持续时间短,苗齐较冷藏处理早21 d。沙藏保存种子的幼苗高、地径的全年平均累计生长量极显著大于冷藏处理。3月17日播种的幼苗高、地径的全年平均累计生长量极显著大于4月1日播种幼苗的生长量。 相似文献
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Schoefs B 《Tree physiology》2002,22(4):285-290
Gleditsia triacanthos L. pods were harvested at San Lorenzo del Escorial, Madrid, Spain, before and after seed desiccation. Maturing green pods, harvested from trees, contained soft light-green seeds, whereas fully mature brown pods, collected on the ground, contained hard dark-green seeds. Based on visual inspection of seeds, it was determined that the green color is located in the cotyledons and embryo of soft seeds but mainly in the seed coat of hard seeds. High performance liquid chromatographic analysis indicated that both hard and soft seeds contained the same set of photosynthetic pigments as fully developed leaves, but in different proportions. The hard and soft seeds mainly differed in their chlorophyll a to chlorophyll b ratio and in the composition of the xanthophyll cycle pool of pigments. Fluorescence at -196 degrees C revealed that the molecular organization of the pigment molecules in the seed coat of hard seeds differed from that in intact cotyledons of soft seeds and intact green leaves. The -196 degrees C fluorescence spectra also revealed the presence of a small heterogenous pool of non-photoactive protochlorophyll(ide)s, similar to those found in dark-grown tissues of gymnosperms and angiosperms. 相似文献
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Effects of drought stresses induced by polyethylene glycol (PEG) (0.0%, 10%, 15%, 20%, 25%, and 30%, with four replicates)
on germination of Mongolian pine (Pinus sylvestris var. mongolica) seeds produced in plantations (southern Keerqin sandy land) and natural forests (Hulunbeier sandy plain) were observed.
The results indicated that the seeds from both provenances did not germinate when PEG concentration was more than 25%. The
time of initial germination and that of its completion of stressed seeds from both provenances were delayed when compared
with the unstressed seeds. The germination capacity and germination rate of natural seeds were significantly higher than those
of plantation seeds for all treatment levels (P < 0.05). The mean growth rates of radicle and hypocotyl from natural seeds were significantly higher than those from plantation
seeds at all treatment levels below 20% PEG treatment (P < 0.05). The ratios of radicle to hypocotyl of 20% PEG treatment were significant higher than those of the corresponding
controls for both provenances (P < 0.05). These results suggested that Mongolian pine seeds/seedlings had stronger resistance to PEG drought stresses; 10%
PGE stress did not significantly influence germination. Natural seeds exhibited more resistance to PEG stress than plantation
seeds. It was concluded that drought stress on seed germination might be one cause of obstructed natural regeneration of Mongolian
pine plantations on sandy land. It is recommended that natural seeds be used for afforestation, and light drought stress (e.g.,
10% PEG stress) may be useful in improving seed germination and the growth of radicles and hypocotyls. 相似文献
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通过采集不同发育阶段种子并对其进行自然干燥处理,以含水量、发芽率和ABA含量变化为指标,研究了色木槭和拧筋槭种子在自然发育和干燥过程中的脱水耐性变化.结果表明,色木槭和拧筋槭种子虽经历了成熟脱水,但种子仍不耐脱水;其发芽率和活力指数随发育进程而逐渐增加,但随自然脱水进程而逐渐降低;色木槭和拧筋槭种子最大脱水耐性分别出现在花后100 d和120 d;在整个发育过程中,两树种种子的ABA(脱落酸)含量均较低;拧筋槭种子中ABA含量在脱水过程中呈下降趋势,而色木槭种子中ABA含量在脱水过程中虽有升高但变化不显著.推测ABA含量低可能为色木槭和拧筋槭种子不耐脱水的主要原因之一. 相似文献
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以采自日本不同地区的抗松材线虫病黑松品种"虹青"(Pinus thunbergii'Hongqing')种子为材料,研究不同基质处理下的种子出苗率、成苗率及幼苗生长的差异.结果表明:以蛭石为黑松容器育苗基质,除东京都町田市种子的成苗率低于净营养基质处理外,其出苗率、以及静岡县御殿场市、九州种子的出苗率和成苗率均高于净营养基质和河沙处理,其中九州种子的出苗率及成苗率最高,分别为62.7%和52.1%;河沙处理的出苗率和成苗率均最低;九州的种子质量最佳,播种于蛭石中的7个月幼苗平均高8.85 cm,地径为5.1 mm;东京都町田市的种子质量最差.采用蛭石为育苗基质,对立枯病进行早防早治,能大幅度提高黑松出苗率及成苗率. 相似文献
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