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几种植物生长调节物质在新疆棉区的应用效果 总被引:2,自引:0,他引:2
几种植物生长调节物质在新疆棉区的应用效果王冀川杨正华新疆塔里木农垦大学阿拉尔8433001997年在新疆对棉花上国内常用的植物生长调节剂进行对比试验,进一步筛选出适合新疆推广的植物生长调节剂,这对棉花生产将有一定的指导意义。现将结果报导如下。1试验... 相似文献
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施特利303在棉花上应用研究初报鲁速明,刘新稳(江西省棉花研究所)为研究施特利等多种植物生长调节剂的增产效果和应用价值及使用方法,1992-1993年间我们进行了单一品种不同浓度不同时间叶面喷施等清水为对照的比较试验,在此初试基础上,1994年进行了... 相似文献
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短季棉一次性化调技术关键廖贵,王义明(唐山市农业科学研究所、唐山063001)植物生长调节剂在棉花上的应用,已成为一项必备的常规增产措施。技术进步使棉花全程化控技术日臻完善,它打破了传统的棉花管理模式,能够按照目标设计,把握合理的生育进程,塑造理想株... 相似文献
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随着科学技术的不断进步,新型植物生长调节剂不断出台,应用范围不断扩大。为进一步鉴定各调节剂在棉花上的应用效果,于1992年进行了3种调节剂的比较试验。 相似文献
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《Plant Production Science》2013,16(4):468-472
AbstractImprovement of early seedling growth, such as seedling emergence and vigor is one of the most important agronomic traits in direct seeding rice cultivation. The effects of two plant growth regulators (PGRs), gibberellic acid (GA3) and ethephon (ET), on seedling growth under flooded soil conditions at different temperatures and water depths were investigated. The PGRs were applied during the seed soaking process. A single treatment with GA3 or ET increased seedling growth. However, combined application of GA3 and ET was more effective than that of GA3 or ET alone in many cases at both growing temperatures (15 and 20ºC). The growth of different organs in the rice seedlings, such as the coleoptiles, first leaves, and second leaves was also increased by PGR treatment. The nitrogen concentration of the shoot and the ratio of shoot dry weight to shoot length did not differ significantly among the treatments. The results of our study show that rice seedling growth in direct seeding cultivation may be improved by treatment with GA3 and ET in combination. 相似文献
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Summary The modifying effects of applying the plant growth regulators (PGRs) benzylaminopurine (BAP), gibberellic acid (GA3) and BAP+GA3 on physiological age were studied. Two experiments with two cultivars, differing in rate of physiological ageing (medium-early
Pampeana, medium-late Huinkul) and two storage systems were performed during 1988/89 and 1989/90 in two different potato areas
of Argentina.
In both seasons seed tubers stored in heaps reached an advanced physiological age at planting, compared with tubers from the
cold store. Seed tubers of cv. Pampeana were older than those of Huinkul. compared with control crops, those sprayed with
BAP maintained ground cover and photosynthesis for longer, and those sprayed with GA3 for a shorter period. Consequently tuber yield was decreased by GA3 in 1988/89, but in 1989/90 all crops treated with PGRs outyielded the control. BAP could overcome effects of advanced physiological
age on crop senescence and tuber yield.
CIC BA
This work was carried out with a research grant from CAFPTA (249/89). 相似文献
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水稻育秧基质理化性状对秧苗品质的影响 总被引:1,自引:0,他引:1
以木薯渣、甘蔗滤泥、稻田土为原料配成不同水稻育秧基质,以‘桂育9号’为供试品种,探究不同水稻育秧基质理化性状对秧苗品质的影响。结果表明:除不定根数、单位面积秧苗数外,秧苗各性状皆与基质的理化性状存在显著或极显著相关性。基质容重的减小和孔隙度的增大使得秧苗株高、叶面积、单位体积基质生产秧苗鲜重显著增大,而根系盘结力显著减小;基质p H中性左右对秧苗品质无显著影响。在2.7 m S范围内,基质电导率增大对株高、叶面积、单位体积基质生产秧苗鲜重有显著促进作用;碱解氮、速效磷、速效钾、有机质对秧苗株高、SPAD值、叶面积和单位体积基质生产秧苗鲜重有显著促进作用,其中速效磷还对秧苗茎基宽、叶龄、地上部干重、发根能力有显著或极显著促进作用,而与根系盘结力则呈极显著的负相关。 相似文献
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水稻温敏核不育系后发分蘖穗定向培养技术研究 总被引:1,自引:0,他引:1
定向培养水稻温敏不育系后发分蘖穗生产核心种子,是核心种子生产新技术。2008年在广西灵川对P88S和准S的移栽秧龄、施肥方式、移栽秧苗带蘖数与后发分蘖穗形成的影响进行了研究,结果表明:P88S于7~8叶龄移栽,其后发分蘖数较4~6叶龄移栽多;以单株带1蘖秧苗移栽比单株不带蘖秧苗和单株带2蘖秧苗移栽更有利于培养后期分蘖。准S于6叶龄移栽,其后发分蘖较4~5叶龄移栽多;以单株不带蘖秧苗移栽比单株带1蘖秧苗和单株带2蘖秧苗移栽更有利于培养后期分蘖。按基肥30%十追肥70%施肥,P88S和准S群体的分蘖速率均明显高于按基肥50%+追肥50%和按基肥70%+追肥30%施肥的分蘖速率。因此,采用大秧龄移栽、单株带1蘖秧苗或单株不带蘖秧苗移栽及适当少施基肥多施追肥的方式,有利于培养单株多层穗结构。 相似文献
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以杂交水稻“桂两优2号”为试材,设土床旱育秧(A1)、编织布旱育秧(A2)、塑盘旱育秧(A3)、塑盘湿润育秧(A4)4种方式,在不同育秧方式基础上设置施用壮秧剂和不施壮秧剂2个处理水平,研究育秧方式对抛栽晚稻生长及产量的影响。结果表明:抛栽后立苗最快的是A2,其次是A3,A1和A4最慢;分蘖最快、数量最多的是A2,其次是A3和A1,A4分蘖最慢、数量最少;干物质积累A2和A3具有明显优势,其次是A1,A4积累最少;A2的产量最高,产量性状较好,其次是A3,A4产量最低、产量性状较差。施用壮秧剂可促进晚稻生长,改善产量性状,提高产量。育秧方式与壮秧剂交互作用对晚稻产量及主要性状有显著影响。综合晚稻生长和产量及性状看,本试验条件下最适合的育秧方式是编织布与施壮秧剂组合旱育秧。 相似文献
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以带有不同白粉病病斑面积比例的腰果种子为材料,研究不同白粉病侵染程度的腰果种子发芽率及其幼苗生长的差异。结果表明,白粉病病斑面积比例为100%的腰果种子,其发芽率及其幼苗叶片数、直径、株高、叶长、叶宽总体上均显著低于病斑面积比例小于100%的处理;病斑面积比例在50%~99%之间的腰果种子与病斑面积比例小于50%的种子相比,前者幼苗直径显著低于后者,发芽率及其幼苗株高、叶长、叶宽之间的差异未达显著水平。建议在选择腰果种子用于育苗时,选择白粉病病斑面积比例低于50%的种子,以确保种子发芽率及幼苗质量。受白粉病侵染的腰果种子发芽率与其幼苗生长指标之间显著正相关,发芽率高的种子,其幼苗生长相对较好。 相似文献