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甜玉米种子活力低下原因及其种子处理技术研究进展 总被引:11,自引:1,他引:11
综述了有关甜玉米种子活力低下的生理、遗传和环境等因素的研究进展,种子引发,包衣和有机溶剂渗入等种子处理方法对提高甜玉米种子活力和田间出苗率的效果及其应用前景。 相似文献
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甜玉米种子活力低下原因及其种子处理方法 总被引:1,自引:0,他引:1
综述有关甜玉米种子活力低下的生理、遗传和环境等因素的研究进展,种子引发,包衣和有机溶剂渗入等种子处理方法对提高甜玉米种子活力和田间出苗率的效果及其应用前景。 相似文献
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通过有机溶剂渗入提高超甜玉米种子田间出苗率 总被引:4,自引:2,他引:2
试验以sh2胚乳突变体(超甜3号)为试材,选用了3种有机溶剂进行种子渗入处理,并分早播、适播、迟播三期进行田间播种,考察该方法对提高超甜玉米种子田间出苗率、成苗率效果。试验结果表明,以甘油,或丙酮处理种子对提高早春低温条件下播种的超甜玉米种子田间出苗率、成苗率等有显著的效果,最高可提高田间出苗30.7%。 相似文献
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种子活力测定方法及其评价 总被引:12,自引:0,他引:12
种子检验的目的是评价种子的播种价值,因此如何评价种子的播种品质成为种子检验技术的核心问题。早在19世纪(1869),随着商品经济和生产的发展,种子检验便应运而生,但在相当长的时期内,发芽试 相似文献
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S. H. Begna D. L. Smith R. I. Hamilton L. M. Dwyer & D. W. Stewart 《Journal of Agronomy and Crop Science》2001,186(4):267-271
Identifying corn ( Zea mays L.) genotypes with faster rates of seedling emergence and leaf appearance is important in developing a corn crop with earlier canopy closure and better seasonal light interception. A greenhouse experiment was conducted twice to investigate whether corn genotypes known to vary in canopy architecture and yield potential differed in rates of seedling emergence and leaf appearance. The experiment was arranged in a randomized complete block design utilizing seven genotypes: five of the newly developed Leafy reduced-stature (LRS) types (LRS1, LRS2, LRS3, LRS4 and LRS5), one conventional type [Pioneer 3979 (P3979)], and one late-maturing big-leaf (LMBL) type. Five seeds were planted in each pot and seedling emergence was recorded every day until all seeds emerged. Leaf appearance was recorded from seedling emergence until the plants reached anthesis. There was variability among the genotypes for both seedling emergence and leaf appearance rate. Mean seedling emergence values of greater than 90 % were achieved by four of the five LRS genotypes, and the LRS types generally emerged more rapidly than the others. Leaf appearance rate showed linear increases over time; however, LRS genotypes (in particular LRS3, LRS4 and LRS5) had more rapid leaf appearance rates than the others. The LMBL hybrid ranked last for both seedling emergence (<80 %) and leaf appearance rate. Rapid seedling emergence and leaf appearance by early-maturing genotypes (LRS and P3979, especially LRS) may help these types of genotypes achieve earlier canopy closure and better use of the light available during the growing season, which is critical in a short growing season environment. 相似文献
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为明确电晕场处理对玉米种子活力及生理指标的影响,以玉米品种农大108和津北288为试验材料,研究了优化处理的条件及处理对玉米杂交种活力提高的幅度和生理指标的变化。结果表明,种子含水量不同时最优处理场强和时间随着种子水分含量的升高而降低;随着种子基础活力的提高,处理后种子活力的提高幅度降低,中、低活力的种子发芽率较对照提高12%~24%,活力指数提高28%~51%;在正常种子含水量(12%左右)条件下,350kV/m的场强处理5.6min条件对种子活力的提高效果较好。在优化的处理条件下,电晕场处理后α-淀粉酶、脱氢酶、SOD、POD、CAT活性均显著高于对照,而浸出液电导率显著低于对照。研究表明,在最优条件下,电晕场处理能有效提高种子活力、细胞膜的修复能力和各种代谢酶、保护酶的活性。 相似文献
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玉米种子活力与田间苗期性状相关性研究 总被引:9,自引:1,他引:9
应用标准发芽试验、低温试验、老化试验、电导率、四唑处理等方法对不同劣变水平的玉米杂交种子进行了活力测定,分析了种子活力与实际出苗表现的相关关系。结果表明:低温试验、老化试验、简易活力指数与田间出苗率、成苗率和幼苗整齐度呈极显著或显著的正相关关系,是玉米种子活力测定的较好方法。 相似文献
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PEG处理提高长豇豆种子活力的初步研究 总被引:7,自引:2,他引:7
本文探讨了用PEG预处理提高长豇豆种子活力的可能性,认为在种子处理前宜先了解其活力状况。在15℃下用25%PEG6000水溶液预处理低活力种子1~2天、高活力种子2~3天均有促进萌发、提高活力的作用。高活力种子具有较强的抵抗低温高湿的能力,因此早春播种要选用高活力种子或经PEG预处理将其活力水平提高后的种子。本文还对PEG处理提高种子活力的部分原因和种子利用价值问题作了讨论 相似文献