摘要
无土栽培是一种不用天然土壤而采用含有植物生长发育必需元素的营养液来提供营养,使植物正常完成整个生命周期的栽培技术。在无土栽培技术中,能否为植物提供一种比例协调,浓度适量的营养液,是栽培成功的关键。紫云英(Astragalus sinicus L.),豆科(Leguminosae)黄芪属1年生草本,因冬春大多草本枯黄之际仍可覆盖地面,且碧叶红花具有一定的观赏价值,可作为一种观赏型绿化植物开发利用。
本试验采用宁波大桥作为试验材料,通过对紫云英无土栽培营养液浓度和植物生长延缓剂浓度的研究,筛选出适合紫云英营养生长的营养液最佳浓度,以及与之相配套可提高其观赏价值的植物生长延缓剂浓度,为研究及利用紫云英无土栽培技术并将其作为草坪植物提供了实践和理论依据。试验结果表明:①不同浓度营养液处理对紫云英植株生长的影响存在差异。综合考虑营养液各浓度对紫云英生长发育各项指标的影响,认为8s浓度较适合紫云英的生长。②烯效唑、多效唑的各浓度处理均不同程度地优化了紫云英草毯的群体结构,使其植株矮化,叶色加深;但在低浓度时抑制效果都不佳。多效唑在200mg/L矮化效果最好,其次为150mg/L,烯效唑为200mg/L最佳,其次为100mg/L。其次,多效唑和烯效唑均能有效提高紫云英抗性,其中以多效唑200mg/L和烯效唑100mg/L浓度处理最为突出。因此综合考虑两方面对紫云英的影响,烯效唑、多效唑处理的最佳浓度分别为100mg/L和200mg/L,以后者效果突出。③综合评价结果:多效唑200mg/L浓度处理下的紫云英草坪外观品质最适合观赏,其次为烯效唑100mg/L。
Soilless cultivation is a technology that can be applied to provide nutrient to plant not in natural soil but in the nutrient solution that contains the necessary elements for the growth of plants; with this technology, the plants can pass its whole life cycle in the normal way. In soilless cultivation, whether a reasonable proportion and moderate concentration of nutrient solution can be provided is the key which can lead to the success of the cultivation. Astragalus sinicus L., annual herb, belongs to Leguminosae of Astragalus family. Because it can cover the ground in winter when other chlorophyte disappear, and it also has the value to be appreciate, it can be utilized and developed as a chlorophyte.
Ningbo da qiao—one breed of Astragalus sinicus L.was used in this experiment. According to research on concentration of nutrient solution and plant growth retardant, the concentration of nutrient solution and plant growth retardant fitting in with its growth were selected out in this thesis. The results were as follows:①Six concentrations of nutrient solution were adopted in this experiment. After analysis data about effect of every treatment of concentration on growth indexes of Astragalus sinicus L., the treatment 8s is more suitable for its growth.②Different concentration treatment of Uniconazol and Paclobutrazol optimized the population structure of Astragalus sinicus L.. The plant height got shorter and the leaf color deepened; however, the effect of inhibition was poor at lower level of concentration. 200mg/L Paclobutrazol treatment has better effect of height control, and 150mg/L is the next. The better concentration of Uniconazol to control the height is 200mg/L, the next is 100mg/L. Secondly, Uniconazol and Paclobutrazol treatment can both increase the resistance of Astragalus sinicus L. effectively. After all-round consideration of the effect of two factors on Astragalus sinicus L., the optimal concentration is 200 mg/L Paclobutrazol treatment and 100mg/L Uniconazol treatment, and effect of the former is better.③In view of comprehensive evaluation, the apparent quality of Astragalus sinicus L.was quite good after treated with 200mg/L(PP333), the next is 100mg/L (S3307).
引文
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