海藻液肥对黄瓜抗盐分胁迫能力的影响

通过水培试验研究了叶面喷施海藻液肥对黄瓜抗盐分胁迫能力的影响。结果表明,叶面喷施海藻液肥能提高黄瓜根冠比和干物质含量,提高根系总吸收面积和活跃吸收面积;不同浓度的海藻液肥均能降低盐胁迫对叶片质膜的伤害,提高SOD、POD等酶的活性,降低膜脂过氧化产物MDA的积累,提高脯氨酸、可溶性糖、可溶性蛋白等渗透调节物质的含量。

海藻液肥对黄瓜抗水分胁迫能力的影响

通过土培盆栽试验,研究了水分胁迫下海藻液肥对黄瓜植株生长的影响。结果表明:海藻液肥处理与对照比较,能促进黄瓜植株的生长,植株根体积,根系活力均有提高,减轻水分胁迫对叶片质膜的伤害;海藻液肥提高了黄瓜植株SOD、POD等酶的活性,提高脯氨酸、可溶性蛋白等渗透调节物质的含量,降低MDA含量的积累。当水分胁迫解除后,海藻液肥处理酶活力的下降幅度低于对照。海藻液肥对黄瓜植株可溶性糖含量的变化无明显影响。

海藻液肥在蜜柑栽培上的运用

温室蜜柑栽培被视为柑桔产业的救世主.因为产量高、质量好,果实能在树上完熟,但收获后树势会变弱,宜接影响到第二年的产量和质量.露地栽培也同样是追求高质量、多品种生产,尤其是在树上完熟的、无论哪类品种,采收后,树势都很衰弱,恢复树势是最重要的环节.常规管理方法难以承担此任.

酶解海藻渣制备海藻液肥的工艺研究

为了开辟海藻渣废物利用的新途径,以工厂中提取海藻酸后产生的废渣为原料,采用浓盐酸预处理和纤维素酶、果胶酶、木聚糖酶、木瓜蛋白酶复合酶酶解,制得海藻液肥,讨论了不同的酶解条件对海藻渣提取率的影响。结果表明:较为理想的酶解条件为酶用量为9(相对于海藻渣的质量比),酶配方为纤维素酶50%,果胶酶30%,木聚糖酶10%,木瓜蛋白酶10%,pH7.0,温度40℃,酶解时间24h时海藻渣的提取率为46.21%。

海藻液肥对草莓品质及贮藏的影响

田间试验结果表明 ,海藻液肥能有效的促进草莓植株生长 ,提高草莓植株的根冠比 ,促进养分在植株体内的运输 ;同时提高草莓可溶性固形物、Vc含量、SOD活力及糖酸比。在贮藏过程中能延缓草莓可溶性固形物、Vc含量和SOD活力的降低。

海藻生物有机液肥对蔬菜种子萌发和幼苗生长的影响

[目的]研究海藻生物有机液肥对不同蔬菜的种子萌发和幼苗生长影响效果。[方法]以不同稀释浓度的海藻生物有机液肥,对黄瓜、番茄、辣椒3种蔬菜种子进行浸种处理和盆栽试验,观察海藻生物有机液肥对蔬菜种子萌发和幼苗生长的影响效果。[结果]与对照相比,施用600倍稀释的海藻生物有机液肥的黄瓜、番茄种子的发芽率存在显著差异,施用400倍稀释的海藻生物有机液肥的辣椒种子的发芽率存在显著差异;以不同稀释倍数的海藻生物有机液肥浸种处理的辣椒种子的发芽势和发芽指数无显著差异。200、400倍稀释的海藻生物有机液肥对黄瓜、番茄、辣椒幼苗生长的根长、株高、株鲜重、株干重、叶绿素含量、叶面积均有显著提高。600倍稀释的海藻生物有机液肥处理黄瓜种子后,幼苗与对照相比,根长、叶绿素含量、叶面积存在显著差异,但株高、株鲜重、株干重无显著差异。600倍稀释的海藻生物有机液肥对辣椒、番茄浸种后,与对照相比,幼苗根长、叶绿素含量、株高、株鲜重、株干重存在显著差异,但叶面积无显著差异。[结论]海藻生物有机液肥应用蔬菜种子浸种,对提高发芽率和幼苗壮苗具有较好的效果。

复合酶解耦合微生物发酵制备海藻生物有机液肥的研究

为了开发海洋生物质资源,以大型海藻为原料,利用生物法制备海藻有机液肥,采用复合酶解耦合微生物发酵法,研究了影响酶解效率的pH、温度、酶添加量和反应时间等因素,并利用正交试验获得复合酶解海藻的优化工艺参数。同时为进一步提高海藻细胞内生物活性物质的释放,利用微生物菌剂对海藻酶解液进一步发酵,获得最适发酵工艺条件。结果表明,复合酶解耦合微生物发酵法制备海藻肥的最佳酶解条件为酶解pH 6.5、酶解温度65℃、酶添加量5%、酶解时间8 h。利用微生物菌剂对海藻酶解液发酵的最佳发酵工艺条件为发酵时间36 h、微生物菌剂接种量0.3%、发酵装瓶量40 mL/100 mL、发酵温度45℃、发酵初始pH 6.5。经种子萌发试验,复合酶解耦合微生物发酵制备的海藻液肥可以显著提高种子萌发率。

不同浓度海藻生根剂对黄瓜幼苗生长及根系形态的影响

以黄瓜品种‘鲁黄瓜3号’为试验材料,在穴盘育苗条件下,研究了灌根施用600、300、100倍液海藻生根剂对黄瓜幼苗生长的影响,以筛选黄瓜壮苗培养的最适施用浓度。结果表明:随着海藻生根剂稀释倍数的降低,根系生长旺盛。在施用300倍液时,幼苗壮苗指数达到峰值。继续降低稀释倍数,幼苗根系生长量和根尖数目增加则受抑制,壮苗指数显著下降。300倍液处理的幼苗根系吸收面积、根尖数显著高于清水对照,分别高出36.58%、133.39%,幼苗株高、茎粗及叶面积均增大,叶片叶绿素含量显著高于对照。灌根施用300倍液海藻生根剂,可同时促进黄瓜幼苗地上和根系的生长,是培育黄瓜穴盘壮苗的最佳浓度。

Effects of Liquid Seaweed Bio-organic Fertilizer on Seed Germination and Seedling Growth of Vegetables

[Objective] This study aimed to investigate the effects of liquid seaweed bio-organic fertilizer on seed germination and seedling growth of different vegetables. [Method] Serial dilution concentrations of liquid seaweed bio-organic fertilizer were prepared for seed soaking and pot incubation of cucumber, tomato and chili, to ob- serve the effects of liquid seaweed bio-organic fertilizer on seed germination and seedling growth of vegetables. [Result] Compared with the control, germination rate of cucumber and tomato seeds applied with 600-fold liquid seaweed bio-organic fer- tilizer varied significantly; germination rate of chili seeds applied with 400-fold liquid seaweed bio-organic fertilizer varied significantly; germination energy and germination index of chili seeds applied with different dilution concentrations of liquid seaweed bio-organic fertilizer presented no significant differences. In addition, 200-fold and 400-fold liquid seaweed bio-organic fertilizer significantly improved the root length, plant height, plant fresh weight, plant dry weight, chlorophyll content and leaf area of cucumber, tomato and chili seedlings; after treated with 600-fold liquid seaweed bio-organic fertilizer, root length, chlorophyll content and leaf area of cucumber seedlings varied significantly compared with the control, but no significant differences were observed in plant height, plant fresh weight and plant dry weight; after treated with 600-fold liquid seaweed bio-organic fertilizer, root length, chlorophyll content, plant height, plant fresh weight and plant dry weight of chili and tomato varied sig- nificantly compared with the control, but no significant differences were observed in leaf area. [Conclusion] Soaking vegetable seeds with liquid seaweed bio-organic fer- tilizer can significantly improve seed generation rate and seedling growth.