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生长激素处理薄壳山核桃容器苗生长效应初探 总被引：3，自引：0，他引：3
试验用不同质量浓度GA3和PP333溶液分别喷施薄壳山核桃容器苗叶面,用不同质量浓度GA3溶液涂抹薄壳山核桃容器苗茎基部;同时在薄壳山核桃容器苗生长旺季初期分3个时期摘心进行对比试验。结果表明,叶面喷施不同质量浓度GA3溶液能显著促进薄壳山核桃苗高生长,但对增粗生长无影响。不同溶度GA3溶液涂抹薄壳山核桃容器苗茎基部、不同质量浓度PP333溶液喷施薄壳山核桃容器苗叶面及不同时期摘心处理都能显著促进薄壳山核桃苗的增粗生长。GA3茎基部涂抹处理相比对照地径增粗26.90%~76.55%,PP333处理相比对照地径增加21.70%~66.04%,摘心处理地径增粗仅为3.79%~23.48%。600 mg/L的GA3溶液涂抹茎基部对薄壳山核桃容器苗生长发育效果最好,300 mg/L的PP333溶液喷施叶面能有效促进薄壳山核桃容器苗增粗,比对照地径分别增粗71.12%和66.04%。 相似文献
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以风信子品种‘蓝夹克’为供试材料研究了叶面喷施不同浓度的多效唑(PP333)对风信子生长和开花的影响,研究结果表明叶面喷施100 mg/L的PP333延缓‘蓝夹克’的生长,使植株适量矮化、叶面积适度减小,植株更紧凑;与对照相比,叶片厚度增加了5.8%,小花直径增加了2.8%,种球质量增加了5.3%。同时提高了植株叶片的叶绿素含量,将现蕾时间推迟4天,并使花期延长4天,总体上提高了‘蓝夹克’的观赏价值。叶面喷施300 mg/L的PP333因浓度较高,表现出一定的抑制作用。 相似文献
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通过植物生长调节剂处理旱冬瓜苗木,以找出可以加快苗木生长速度的植物生长调节剂,采用不同植物生长调节剂(PP333、NAA、GA3)及其浓度(0mg/L、50mg/L、100mg/L、200mg/L、400mg/L)对旱冬瓜幼苗进行了叶面喷施试验,结果表明:各植物生长调节剂对旱冬瓜苗木各项生理指标都有不同程度的促进作用,GA3、PP333对旱冬瓜苗木的叶绿素含量在浓度为200mg/L时影响最明显。 相似文献
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为了提高盆栽一品红的观赏效果,应用盆土混加不同剂量的多效唑对其进行矮化试验,结果表明：盆土混加多效唑0．5～16mg/盆的处理能明显抑制植株生长。 相似文献
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采用CEPA、GA3、PP333、B9等植物生长物质,以不同浓度处理马尾松、黑松、湿地松、火炬松枝梢,比较药剂种类和处理浓度对枝梢生长的影响。结果表明: GA3(2 500 mg·L-1)对各供试树种均有显著促进作用(试验3中对湿地松除外);试验1中,5 000 mg·L-1 PP333显著抑制马尾松枝和黑松枝的伸长生长,具有最佳调节效果;试验2中,5 000 mg·L-1 PP333显著抑制湿地松和马尾松枝的伸长生长,具有最佳调节效果;试验3中,5 000 mg·L-1 PP333＋5 000 mg·L-1B9复合制剂显著抑制湿地松和火炬松枝梢的伸长生长,具有最佳调节效果。用"Y"型嗅觉仪测定微红梢斑螟成虫对松梢的嗅觉反应,结果表明处理组枝梢对微红梢斑螟成虫驱避效果明显;微红梢斑螟等松梢害虫危害率调查表明,处理枝梢的被害率也明显低于对照枝梢。 相似文献
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万寿菊的组织培养和瓶苗开花研究 总被引：4，自引：0，他引：4
对矮生杂交万寿菊组织培养研究表明：带1个腋芽的无菌苗茎段在MS＋0．05mg／LNAA＋0.2mg／LBA培养基上35d均可诱导出芽,芽诱导率达100％;继代培养时,MS＋0．1mg／LBA是万寿菊较适宜的增殖培养基,平均增殖系数可达10．7,生根率为100％。将带有2个腋芽和1个顶芽的茎段接种到MS＋0.05mg／LBA＋0.4mg／LPP。培养基上,20d后,就能长成1株有根、茎、叶和花蕾、花朵的完整植株。 相似文献
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用25、507、5、1001、25 mg/L的多效唑,对大丽花＂陇上雄鹰＂进行喷施和根灌处理,研究多效唑对大丽花生长、开花和部分生理指标的影响。结果表明：根施效果优于喷施。喷施浓度以125 mg/L效果较好,矮化率达37.6%,花径增加2.5 cm,叶绿素含量增加,SOD活性达到对照的3.2倍;根施浓度为75 mg/L和100 mg/L时效果最佳,矮化率分别达54.2%和55.9%,花朵增大,叶绿素含量增多,SOD活性为对照的5.9倍。 相似文献
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Long-term hydraulic acclimation to resource availability was explored in 3-year-old Populus deltoides Bartr. ex Marsh. clones by examining transpiration, leaf-specific hydraulic conductance (G(L)), canopy stomatal conductance (G(S)) and leaf to sapwood area ratio (A(L):A(S)) in response to irrigation (13 and 551 mm year(-1) in addition to ambient precipitation) and fertilization (0 and 120 kg N ha(-1) year(-1)). Sap flow was measured continuously over one growing season with thermal dissipation probes. Fertilization had a greater effect on growth and hydraulic properties than irrigation, and fertilization effects were independent of irrigation treatment. Transpiration on a ground area basis (E) ranged between 0.3 and 1.8 mm day(-1), and increased 66% and 90% in response to irrigation and fertilization, respectively. Increases in G(L), G(S) at a reference vapor pressure deficit of 1 kPa, and transpiration per unit leaf area in response to increases in resource availability were associated with reductions in A(L):A(S) and consequently a minimal change in the water potential gradient from soil to leaf. Irrigation and fertilization increased leaf area index similarly, from an average 1.16 in control stands to 1.45, but sapwood area was increased from 4.0 to 6.3 m(2) ha(-1) by irrigation and from 3.7 to 6.7 m(2) ha(-1) by fertilization. The balance between leaf area and sapwood area was important in understanding long-term hydraulic acclimation to resource availability and mechanisms controlling maximum productivity in Populus deltoides. 相似文献
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研究以非洲紫罗兰幼嫩叶片为外殖体,MS为基本培养基,添加不同浓度6-BA、NAA、GA等外源激素对其愈伤形成、不定芽分化、增殖与不定根形成的影响,试验表明:采用MS+6-BA0.1～2.0mg·L-1+NAA0.01～0.5mg·L-1培养基,愈伤诱导率在20%以上;采用MS+6-BA0.1～1.0mg·L-1+NAA0.01～0.5mg·L-1+GA0.1～1.0mg·L-1培养基,对芽的生长及增殖效果好,并指出GA具有提高不定芽长势和成苗率的作用;采用1/2MS+NAA0.1～0.5mg·L-1或IBA0.1mg·L-1或IAA0.1～0.5mg·L-1,20d内生根率可达97%以上。在腐叶土∶珍珠岩=5∶3的基质中驯苗,成活率达90%以上。 相似文献
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Bilas Singh 《Journal of Sustainable Forestry》2013,32(6):480-495
We assessed interactive effects of varying levels of applied phosphorus fertilizer and water stress on growth, productivity, and mineral accumulation in container-grown Dalbergia sissoo L. seedlings. Height, collar diameter, leaf size and area, root volume and total biomass were reduced, and dry matter allocation to root was increased with increasing levels of soil water stress. The reduction was >32% in growth, >50% in leaf, and >77% in biomass when seedlings were grown with <50% of soil field capacity. Phosphorus application at the level of 10 mg kg?1 soil enhanced stems and leaf biomass and nutrient accumulation at all irrigation levels, and thus tolerance to drought. Phosphorus responses to growth and biomass production increased with irrigation levels. Thus, 20 mg P kg?1 soil is beneficial at sufficient soil water availability and a lower dose (i.e., 10 mg P kg?1) is recommended under high soil water stress conditions to benefit growth and productivity of D. sissoo. 相似文献