绿丰收浸种对油菜种子萌发,幼苗生长和产量的影响

用不同浓度的绿丰收处理油菜种子的试验结果表明：不同浓度处理对种子萌发速率，幼苗展开叶片数，苗高，叶面积，叶片叶绿素含量，产量均产生了一定的影响，１２００倍液效果最佳，可使幼苗展开叶片数增加０．１９片，苗高增加０．６１ｃｍ，叶面积增加２７．２７％，叶绿素含量增加２４．１３％，单盆产量增加２７．３４％。     

穿心莲内酯对小麦种子萌发与幼苗生长的影响

探究穿心莲内酯对小麦种子萌发和幼苗生长的影响。采用不同质量浓度穿心莲内酯浸种处理,以清水和生物源植物生长调节剂油菜素内酯为对照,测定发芽率、发芽势、根长、苗高、鲜质量、干质量等指标。结果表明,随着穿心莲内酯质量浓度的升高,其促进作用先升高后降低,质量浓度150 mg/L的穿心莲内酯溶液对小麦种苗生长促进作用明显,为研究绿色农业植物生长调节物质提供基础。     

扑尔敏对玉米种子萌发及幼苗生长的影响

采用室内培养法,以清水和油菜素内酯作为对照,分析不同浓度的扑尔敏溶液浸泡玉米种子对其发芽率、茎长、根长、植株质量、叶绿素含量及可溶性蛋白含量等指标的影响。结果表明,在一定浓度范围内扑尔敏对玉米种子萌发及幼苗生长有促进作用,且随着扑尔敏质量浓度的增大,玉米种子的发芽率、茎长、根长、植株质量、叶绿素含量、可溶性蛋白含量等均呈现先升高后降低的趋势,以260 mg/L处理各指标最好,各项指标均优于0.3 mg/L油菜素内酯处理。     

用BcFA浸种对油菜种子萌发,幼苗生长及产量的影响

用ＢｃＦＡ浸种的研究结果表明，在ＢｃＦＡ浓度分别为：２０倍液、４０倍液、６０倍液、８０倍液、１００倍液和清水的六个处理中，五个ＢｃＦＡ处理的对种子的萌发速率、出苗率、幼苗的展开叶片数、苗高、产量均有一定的促进作用，尤其以６０倍液效果最佳，可使油菜种子萌发速率提高１３．２％，幼苗展开叶片数增加０．３５个，苗高增加１．４１ｃｍ，单盆产量增加２．１ｇ。     

用BcFA浸种对油菜种子萌发、幼苗生长及产量的影响

用BcFA浸种的研究结果表明,在BcFA浓度分别为:20倍液、40倍液、60倍液、80倍液、100倍液和清水的六个处理中,五个BcFA处理的对种子的萌发速率、出苗率、幼苗的展开叶片数、苗高、产量均有一定的促进作用,尤其以60倍液效果最佳,可使油菜种子萌发速率提高13.2％,幼苗展开叶片数增加0.35个,苗高增加1.41cm,单盆产量增加2.1g。     

苦参碱对大麦种子萌发及幼苗生长的影响

采用室内培养皿法,以清水和油菜素内酯作对比,分析不同浓度的苦参碱制剂浸种大麦种子对大麦的种子发芽率、苗高、根长等形态指标,以及叶绿素和可溶性糖含量等的影响。结果表明,苦参碱对大麦种子萌发及幼苗生长有促进作用,且随着苦参碱质量浓度的增大,大麦的种子发芽率、苗高、根长、叶绿素和可溶性糖含量呈先升高后降低的趋势,以100 mg/L处理各指标最好。此外,100 mg/L苦参碱浸种处理对大麦幼苗各项指标的影响与25 mg/L油菜素内酯相似或比25 mg/L油菜素内酯好。     

腐植酸包衣对玉米种子萌发及幼苗生长的影响

在正常水分和水分胁迫两种处理条件下研究腐植酸包衣对玉米种子萌发及幼苗生长的影响。结果表明,腐植酸包衣能提高玉米种子的发芽率、发芽指数及活力指数,使玉米幼苗变高、叶鞘增粗、根长增加、根冠比提高。测定玉米幼苗     

烟酰胺对小麦萌发及幼苗生长的影响

以小麦种子烟农19为试验材料,采用培养皿纸上发芽法,以纯水为对照,研究不同浓度烟酰胺溶液对小麦种子萌发及幼苗生长的影响.结果表明:烟酰胺溶液浓度为25 mg/L时,处理效果最佳.小麦种子发芽势、发芽率显著提高,分别增加了25.27％、15.58％;小麦幼苗的株高、根长,幼苗的鲜重均显著增加,其中株高增加了36.16％,根长增加了131.47％,幼苗的鲜重增加了38.89％,a-淀粉酶和叶绿素也分别增加了98.40％、87.69％,为研究烟酰胺作为小麦种子包衣剂成分提供了较好的试验基础.     

Cr6+对植物种子萌发和生长的影响

以白菜、玉米和瘤芥菜为研究对象,探讨了Cr6+对植物种子萌发和生长的影响.结果表明,Cr6+对不同植物种子萌发和生长影响不同,不同浓度Cr6+对同一植物种子萌发和生长影响也不同.Cr6+严重抑制白菜种子萌发和生长;Cr6+浓度分别小于250 mg·L-1和200 mg·L-1时能促进瘤芥菜的种子萌发和生长,Cr6+浓度分别大于250 mg·L-1和200 mg·L-1时则抑制其种子萌发和生长;Cr6+浓度小于400 mg·L-1时对玉米种子萌发有促进作用,Cr6+抑制玉米生长.     

杂多酸对小麦种子萌发和幼苗生长的影响

本文研究了不同浓度的杂多酸对小麦种子萌发和幼苗生长的影响。结果发现低浓度的杂多酸促进小麦种子的萌发,高浓度的杂多酸抑制小麦种子的萌发。随杂多酸浓度的增加会抑制幼苗的生长,但会促进小麦根系的分蘖。     

Mimosine-inhibited seed germination,seedling growth,and enzymes ofOryza sativa L

The effect of mimosine (50 ppm and 100 ppm concentrations) onOryza sativa (rice) seed germination; root and shoot growth, i.e., length and fresh weight of seedlings; activities of nitrate reductase, peroxidase, catalase, and IAA oxidase were investigated. Significant inhibition in seed germination and shoot length was noted. Root length was inhibited by 100 ppm mimosine; however, the 50 ppm was not significant. Root and shoot fresh weight was not significantly inhibited by the tested concentrations of mimosine. Significant inhibition in activities of nitrate reductase, peroxidase and its isoenzymes, catalase, and IAA oxidase was observed. Ecophysiological implications of mimosine phytotoxicity are discussed.     

Allelopathic effects of western ragweed on seed germination and seedling growth of selected plants

Western ragweed (Ambrosia psilostachya DC.) top growth and rhizome extracts were inhibitory to germination and growth of seedling shoots and roots of test plants in almost all cases. Germination of all plants tested was reduced an average of 19.5% by the ragweed extracts. Shoot and root growth of plants tested was reduced an average of 56.8% by the ragweed extracts. The combined effects of germination plus growth reductions resulted in the tested plants producing only 34.8% in the extracts compared to production in distilled water.     

两种新型含硅植物生长调节剂的合成及其生物活性

合成了2种新型含硅植物生长调节剂。它们的结构经元素分析、IR和^1HNMR表征。生物活性试验表明,药液质量浓度为25mg/L时,2种目标化合物对水稻根生长比对照化合物1-萘乙酸乙基二甲硅基酯分别提高了10%和13%。     

Effects of bilberry (Vaccinium myrtillus L.) litter on seed germination and early seedling growth of four boreal tree species

Laboratory and greenhouse bioassays were used to test for inhibitory effects of senescent and decomposed leaves and aqueous extract from bilberry (Vaccinium myrtillus L.) against seed germination and seedling growth of aspen (Populus tremula L.), birch (Betula pendula Roth.), Scots pine (Pinus sylvestris L.), and Norway spruce [Picea abies (L.) Karst.]. Aqueous extracts from bilberry leaves were inhibitory to aspen seed germination and seedling growth and also induced root damage and growth abnormalities. Addition of activated carbon removed the inhibitory effects of extracts. Senescent leaves reduced pine and spruce seed germination, but rinsing of seeds reversed this inhibition. Senescent leaves were more inhibitory than decomposed leaf litter, suggesting that the inhibitory compounds in bilberry leaves are relatively soluble and released at early stages during decomposition. Spruce was generally less negatively affected by litter and aqueous extracts than the other tested species. This study indicates that chemical effects of bilberry litter have the potential to inhibit tree seedling recruitment, but these effects were not consistently strong. Phytotoxicity is unlikely to be of critical importance in determining success for spruce seedling establishment.     

促保利素对小麦发芽及大蒜生长的影响

郑州信联生化科技有限公司研发的促保利素是一款集抗逆性、促进光合作用及细胞分裂于一体的高效肥料增效剂。研究了促保利素对小麦发芽和大蒜生长的影响。结果表明:促保利素有促进小麦发芽,促进生长及生根的作用,且浸泡液质量浓度为1~2 mg/L时效果最佳;每667 m~2促保利素用量在0.5~2.0 g时均能促进大蒜生长,其中667 m~2用量为2 g时效果最好。     

Allelopathic effects of fescue on the growth of sweetgum

The height growth of field-planted sweetgum (Liquidambar styraciflua L.) seedlings was reduced where residual fescue (Festuca arundinacea Shreb. Var. Ky. 31) from previous agricultural experimentation was present. Interference (competition+allelopathy) effects of fescue on the growth of sweetgum were tested in the greenhouse. Fescue seeded into pots containing sweetgum seedlings resulted in dry weight reduction of sweetgum from 29 to 95%. Elimination of the competitive effect through the use of a stairstep apparatus implicated an allelopathic mechanism in the interference of sweetgum growth by fescue. Leachates from the rhizosphere of live fescue, dead fescue roots, and dead fescue leaves resulted in reduction up to 60% in dry matter production of sweetgum seedlings. Chemical analysis of sweetgum seedlings from the stairstep experiment suggested impaired adsorption of phosphorus and nitrogen by seedlings treated with fescue leachates.     

植物源生长调节剂对小麦生理生长的影响

用浓度均为100mg/L的植物源生长调节剂(T)、赤霉素(GA3)和油菜素内酯(BR)分别在小麦苗期、拔节期、孕穗期、灌浆期进行叶面喷洒,清水对照(CK)。结果表明,植物源生长调节剂、赤霉素和油菜素内酯分别使小麦叶片中叶绿素含量较对照平均增加了10.77%、4.95%、5.54%;使叶片可溶性糖含量分别平均增加了23.83%、16.65%、14.66%;硝酸还原酶(NR)活性平均提高16.14%、18.26%和12.32%,而对类黄酮含量的影响不明显。这说明植物源生长调节剂能够延缓叶片衰老,促进光合作用,延长叶片对氮素的利用和转化时间,促进同化物质的积累,对小麦的生理生长具有明显的促进作用。