共查询到17条相似文献，搜索用时 453 毫秒
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在锥栗结果母枝抽生花序前 ,用TDS生长调节剂 (质量浓度分别为 3、5、7g·L- 1)对锥栗树冠进行喷布处理 ,能明显提高坐果率。如在雄花序出现的初期再以同样的浓度喷布 1次 ,增产效果则更好 ,以抽生花序前和雄花出现的初期 2次连续喷布 5g·L- 1的TDS溶液增产效果最佳 ,其坐果率和单株产量分别比对照 (喷清水 )增加 5 7.3%和 2 2 .2 %。 相似文献
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草果花期喷施激素对其坐果率与产量的影响 总被引：2，自引：0，他引：2
通过对草果花期分别采用NAA(50 mg/L)、2,4-D(20 mg/L)、GA(100 mg/L)、6-BA(100 mg/L)、爱多收(水剂,0.67 mL/L)、矮壮素(水剂,670 mL/L)、芸苔素(2000 mg/L)和2,4-D钠盐(250 mg/L)喷施,以清水为对照,分析了不同激素处理对草果坐果率及产量的影响。结果表明,(1)激素(含对照)对坐果率、单果重、单花序轴产量均具有极显著的差异影响,草果花期喷施激素后坐果率、单花序轴产量和单位面积产量都高于对照;(2)喷施2,4-D、2,4-D钠盐、6-BA和矮壮素后单位面积产量达4909.05 kg/hm2、4723.20 kg/hm2、4127.40 kg/hm2和4038.30 kg/hm2,分别比对照(239.25 kg/hm2)提高了1951.74%、1874.03%、1625.04%和1 587.78%,其中喷施2,4-D为生产中提高草果产量的最适激素。 相似文献
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《江苏林业科技》2015,(5)
以藤本月季‘安吉拉’为材料,研究植物生长调节剂2.5%芸苔素内酯·吲哚丁酸水剂(27.7,35.7,50,71.4mg/kg)、0.01%芸苔素内酯水剂(0.03 mg/kg)和5%烯效唑可湿性粉剂(125 mg/kg)对其扦插生根的影响。结果表明:3种植物生长调节剂均可以提高‘安吉拉’藤本月季生根的能力;与单独使用芸苔素内酯及烯效唑单剂相比,不同质量分数的芸苔素内酯·吲哚丁酸水剂均可促进藤本月季枝条的生根以及根的生长,以50.0 mg/kg处理的插穗生根效果最显著。说明芸苔素内酯·吲哚丁酸比芸苔素内酯和烯效唑更能显著促进‘安吉拉’月季不定根的形成和生长。 相似文献
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采用正交试验设计,通过制作石蜡切片以及光学显微观察系统研究了植物生长调节剂对油茶芽苗砧嫁接愈合及嫁接苗成活的影响。结果表明:GGR6、IBA、芸苔素内酯能够明显促进愈伤组织的分化形成、砧木和穗条愈伤组织的连接与延伸,进而加快嫁接苗的愈合过程,各处理愈伤比例均值较对照的增幅为28.01%,且比对照至少提前15 d完成愈合;GGR6、IBA、芸苔素内酯的不同浓度及不同施用方法浸基质、蘸根、喷叶对愈伤比例的形成以及嫁接苗成活率的影响差异极显著。促进油茶芽苗砧嫁接愈合的最佳处理方式为:0.03 g·L-1 GGR6、0.2 g·L-1 IBA及0.140.28 mL·L-1 芸苔素内酯混合液500 mL+浸基质1.42 L。 相似文献
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笔者采用"云大120"、GA_3、BA-6等不同药剂组合对新生系3号和黔阳无核椪柑进行了保花保果试验。试验结果表明:"云大120"组合对黔阳无核椪柑保花保果效果很好,坐果率达21.10%,最高达25.00%,比喷清水作对照高5.40%;细胞分裂素组合对黔阳无核椪柑保花保果有增效作用,坐果率达30.91%,比对照高1.10%。 相似文献
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加工型大枣新品种沧蜜1号的选育 总被引：1，自引：0，他引：1
沧蜜1号是以沧州枣树品种资源为材料,经过初选、复选和决选而选育出的枣新品种。果实长圆形,平均单果重17．2g,最大单果重35．2g,果实大小整齐,果形一致,果点大、白色,果面平整光洁,果肉白绿色,肉质疏松,汁液少,核长椭圆形,可食率97．7％,在沧州地区8月中旬白熟,9月上中旬完熟。白熟期采收最适宜加工,可加工成无核水晶蜜枣、有核硬蜜和香酸蜜枣,品质极上。耐瘠薄,抗盐碱,抗病虫能力强。2008年12月通过河北省林木品种审定委员会审定,定名为沧蜜1号。 相似文献
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利用不同浓度的GGR6对南方红豆杉插穗进行处理,通过扦插成活率、生长量、生物量的调查和测定,结果为 流水对插穗进行前处理12 h后,用20 mg·L-1的GGR6溶液浸泡5 h,扦插后插穗成活率大幅度提高,分别高出相 同浓度的2,4-D和萘乙酸处理25.5％和16．2％,为空白对照的2倍。成活苗木的高度和粗度均高于其它处理。表 明用GGR6处理插穗能够提高红豆杉的扦插成活率,并可以促进高生长和径生长。用多菌灵提前处理插穗,能够降 低GGR6的作用效果。 相似文献
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Dong Qin Lijuan Zhao Yu Gary Gao Fangxiao Li Shulei Li Junwei Huo Shuang Lou Peng Liu 《林业研究》2017,28(5):903-908
To elucidate mechanisms regulating ascorbic acid (AsA) biosynthesis and accumulation in the fruit and leaves of black currants, AsA and the activities of key enzymes in the ascorbate–glutathione (AsA–GSH) cycle were measured from fruit set to fruit ripening during fruit thinning treatments of three common commercial black currant cultivars that differed in their AsA levels: ‘Risager’ (low), ‘Brodtrop’ (medium) and ‘Adelinia’ (high). Treatments were 50% fruit reduction (50% of total fruit set) by hand, control was no thinning. Fruit thinning treatment significantly increased AsA content in fruit of all three cultivars from weeks 2 to 8, significantly decreased AsA content in leaves from weeks 3 to 8. Dehydroascorbate reductase and monodehydroascorbate reductase activities in fruit and leaves had a similar pattern, increasing during week 2, rose until they peaked in week 4. Ascorbate peroxidase activity in fruit in the thinning treatment was slightly lower than in the control. Fruit thinning was shown to be a good model to test AsA biosynthesis regulation and accumulation in black currants. The results from our study provided strong evidence that AsA–GSH cycle involved in AsA synthesis and accumulation in fruit. 相似文献
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Changes in gas exchange with leaf age and fruit growth were determined in lychee trees (Litchi chinensis Sonn.) growing in subtropical Queensland (27 degrees S). Leaves expanded in a sigmoid pattern over 50 days during spring, with net CO2 assimilation (A) increasing from -4.1 +/- 0.9 to 8.3 +/- 0.5 micromol m-2 s-1 as the leaves changed from soft and red, to soft and light green, to hard and dark green. Over the same period, dark respiration (Rd) decreased from 5.0 +/- 0.8 to 2.0 +/- 0.1 micromol CO2 m-2 s-1. Net CO2 assimilation was above zero about 30 days after leaf emergence or when the leaves were half fully expanded. Chlorophyll concentrations increased from 0.7 +/- 0.2 mg g-1 in young red leaves to 10.3 +/- 0.7 mg g-1 in dark green leaves, along with stomatal conductance (gs, from 0.16 +/- 0.09 to 0.47 +/- 0.17 mol H2O m-2 s-1). Fruit growth was sigmoidal, with maximum values of fresh mass (29 g), dry mass (6 g) and fruit surface area (39 cm2) occurring 97 to 115 days after fruit set. Fruit CO2 exchange in the light (Rl) and dark (Rd) decreased from fruit set to fruit maturity, whether expressed on a surface area (10 to 3 micromol CO2 m-2 s-1 and 20 to 3 micromol CO2 m-2 s-1, respectively) or on a dry mass basis (24 to 2 nmol CO2 g-1 s-1 and 33 to 2 nmol CO2 g-1 s-1, respectively). Photosynthesis never exceeded respiration, however, the difference between Rl and Rd was greatest in young green fruit (4 to 8 micromol CO2 m-2 s-1). About 90% of the carbon required for fruit growth was accounted for in the dry matter of the fruit, with the remainder required for respiration. Fruit photosynthesis contributed about 3% of the total carbon requirement of the fruit over the season. Fruit growth was mainly dependent on CO2 assimilation in recently expanded dark green leaves. 相似文献
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大花蕙兰制种试验初报 总被引：1，自引：0，他引：1
报道了4个大花蕙兰品种(小提琴,C.’Violin’,维多利亚C.’Victory’,月亮女神C.Pine Clash’Moon Ve-nus’,威利金C.’Willy Gold’)的制种试验结果。品种本身的遗传特性对这4个品种的坐果率有较强影响。其他因素相同时,月亮女神和小提琴的坐果率可以达到80%以上,威利金不结实。威利金与维多利亚杂交,坐果率可以达到20.0%(正交)和36.7%(反交)。单株(单箭)授粉花朵的数量和授粉后肥水管理,是重要的外界影响因子。对月亮女神,单株授粉花数从6朵增加到21朵时,坐果率从100%下降到19.0%。肥水管理不当会引起花果败育,导致坐果率下降。对茎腐病的抗性可作为子代性状早期测定的重要指标。 相似文献