哈尔滨地区早春温室密刺型黄瓜品种比较试验

对中国北方9个密刺型黄瓜(Cucumis satiws L.)品种进行了生育期、植物学性状和产量方面的比较试验,以锦杂十号做为对照品种。结果表明,根瓜采收最早的为津绿26和津绿30,前期产量和总产量最高的为津绿30。从农艺性状和早熟丰产的调查来看,津绿30最适合本地区早春日光温室的栽培。     

基质配比对厚朴穴盘苗生长的影响初报

采用穴盘育苗方法,研究了基于煤渣灰为主料的不同基质配比处理对厚朴(Magnolia officinalis Rehd.et Wils.)幼苗生长的影响。结果表明,厚朴育苗过程中,100%煤渣灰基质所育厚朴幼苗各生长因子均低于100%商用基质,人工复合基质以20%的葛渣+80%煤渣灰基质处理效果最好,与对照相比,其所育厚朴苗各生长因子无显著差异,可以替代以泥炭为主的商用育苗基质。     

铁皮石斛壮苗生根与移栽种植研究

[目的]筛选出较适宜铁皮石斛壮苗生根的培养基和移栽基质及移栽管理方式.[方法]以已分化出真叶的丛生苗为试材,通过研究不同植物激素配比和有机添加剂对铁皮石斛壮苗生根的影响,筛选出促进铁皮石斛试管苗快速生根和壮苗的培养基,同时对铁皮石斛试管苗的移栽进行全面研究,设置不同的移栽基质及移栽管理方式,以提高试管苗的脱瓶移栽成活率.[结果]适宜铁皮石斛生根的培养基为1/2MS+ 6-BA 0.5 mg/L+ NAA 1.0 mg/L+ IBA 2.0 mg/L;适宜铁皮石斛壮苗的培养基为1/2MS+ NAA 0.1 mg/L +6-BA0.5 mg/L;适宜铁皮石斛生根壮苗的有机添加剂为20％香蕉汁;适宜铁皮石斛移栽种植的管理方式为单栽,其中运用单栽管理方式适合铁皮石斛移栽种植的基质为1/3泥炭+1/3松树皮+1/3兰石,60d后成活率达80.0％.[结论]建立一套适合铁皮石斛壮苗生根与移栽种植的方法,为铁皮石斛的产业化大规模种植奠定基础.     

苏州市油菜毯状苗机械化生产技术初探

阐述了毯状苗机栽油菜有利于工厂化育苗,且具有早发优势强、根系发达、春发稳长、群体较优、个体健壮等主要特性;提出了选用高产抗倒优质品种、精细整地、适期移栽、合理群体、优化施肥、配套沟系、化控化除等高产栽培技术,为实现油菜全程机械化生产进行了探索实践。     

贵州旱坡地蜜柚植苗方式对定植成活率的影响

为解决贵州南亚热区冬春季干旱蜜柚植苗成活率低、种苗浪费严重、建园成本高等问题,以红肉蜜柚嫁接苗为试验材料,采用田间比较试验研究了植苗日期、留叶量、蘸(泡)根方法和浇水方式对红肉蜜柚植苗成活率的影响。结果表明:留1/2片叶、泥浆加生根剂蘸根、5月中旬植苗和树盘作集水盘浇定根水加盖簿膜的植苗方式的成活率可达90%以上,该方式建园植苗的成活率高,可有效降低新建园生产成本,提高嫁接苗利用率。     

黄瓜膜联蛋白基因CsANN2的克隆和表达分析

以‘津研四号’黄瓜品种为材料,克隆得到一个黄瓜膜联蛋白基因的cDNA全长,命名为CsANN2。为进一步探究黄瓜CsANN2基因的功能,对CsANN2基因编码的蛋白序列进行生物信息学分析后,发现其理化性质、保守结构域以及多个功能蛋白位点都和其他植物的膜联蛋白一致。系统进化树分析表明,黄瓜CsANN2与AtANN2、AtANN6、AtANN7、BjANN2和BjANN6有较近的亲缘关系。亚细胞定位结果显示,CsANN2蛋白在细胞膜、细胞质与细胞核内都有分布。qRT-PCR结果分析表明,CsANN2基因受ABA、SA、PEG和H2O2诱导表达,但对NaCl胁迫无响应。     

丁二酸浸种对玉米幼苗生理代谢及产量的影响

采用盆栽和大田试验相结合,研究了不同浓度的丁二酸浸种对玉米幼苗生理代谢及产量的影响。结果表明,适宜浓度的丁二酸浸种能够促进玉米幼苗的生长,增加生物量,改善根部性状,提高幼苗叶片叶绿素和可溶性蛋白含量,增强硝酸还原酶活性;用200～400 mg/L浓度的丁二酸浸种可显著增加玉米产量,增产率为12.20%～12.50%。     

利用TPS夏播生产优质实生种薯的研究──夏播实生种薯和常规实生种薯的比较

通过夏播实生种薯和常规实生种薯的比较试验，揭示了夏播实生种薯具有带毒少、出苗率高、长势强、退化轻、晚疫病轻、产量和淀粉含量明显提高等特点．进一步证明利用马铃薯实生种子夏播生产优质实生种薯是效果显著，完全可行的。     

Corn Genotypic Variation Effects on Seedling Emergence and Leaf Appearance for Short-Season Areas

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.     

钵育大苗对水稻生育性状及产量的影响

为探讨水稻钵盘育苗不同秧龄秧苗对低温和盐碱的抵抗能力。采用田间调查和室内考种方法对不同播期的秧苗进行了全生育期的比较研究。结果表明；钵育大苗秧苗综合素质好，插秧后抗低温，抗盐碱能力强，比钵育中苗提早成熟3d，而且可提高产量10.7%。