ABSTRACT

The present investigation was carried out to study the efficacy of foliar feeding of brassinosteroid on growth, yield and quality of strawberry (Fragaria × ananassa Duch.) cv. Winter Dawn. The experimental finding revealed that the physiological growth in terms of leaf number, specific leaf weight, leaf relative water content and total chlorophyll content in the leaf has increased significantly in all the brassinosteroid treated plant with maximum in the treatment consist of three repeated foliar spray of brassinosteroid at vegetative, flowering and again at fruiting stage, irrespective of their concentration. Fruit yield (31.93 tonnes ha⁻¹) with earliest ripening (within 13.67 days after fruit setting) and biggest fruit size (18.43 cc) was obtained in the treatment of three brassinosteroid spray @ 0.2 ppm each at vegetative, flowering and fruiting stage. Further, total soluble solid (TSS): acid ratio and reducing sugar also was measured maximum (21.71 and 5.20%, respectively) in three repeated spray of brassinosteroid @ 0.2 ppm. Hence, it can be concluded that the foliar feeding of brassinosteroid @ 0.2 ppm each at vegetative, flowering and fruiting stage is the best treatment to increase the yield potentiality of strawberry cv. Winter Dawn with improved fruit quality under subtropical condition of Bihar, India.

摘要

本研究旨在研究油菜素类固醇叶面饲喂对草莓（Fragaria×ananassa Duch。）cv的生长，产量和品质的影响。冬天的黎明。实验发现表明，在所有油菜素类固醇处理过的植物中，在叶片数，比叶重，叶片相对水含量和叶片中总叶绿素含量方面的生理生长均显着增加，其中最大的处理是由三次重复的叶面喷施处理。油菜素类固醇在营养，开花和再结实阶段均不受其浓度的影响。水果产量（31.93吨公顷^-1）在营养，开花和结果期分别以0.2 ppm的三种油菜素类固醇喷雾剂处理时，最早成熟（坐果后13.67天内）和最大果实大小（18.43 cc）。此外，在0.2ppm的油菜素甾类的三个重复喷雾中，总可溶固体（TSS）：酸的比率和还原糖也被测量为最大值（分别为21.71和5.20％）。因此，可以得出结论，在营养，开花和结果期，叶面饲喂油菜素类固醇@ 0.2 ppm，是提高草莓cv产量潜力的最佳方法。印度比哈尔邦亚热带条件下的冬日黎明，果实品质得到改善。