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The impact of coconut coir and peat on the growth of Phalaenopsis orchids.
Release time:
2016-09-17 15:41
Source:
Phalaenopsis orchids hold a significant share in the New Year flower market, and large-scale factory cultivation is one of the key factors for their industrial success. After the orchids are taken out of the bottle, the entire cultivation process revolves around the substrate, and the type of substrate is one of the main factors affecting the growth and flowering quantity of Phalaenopsis orchids.
Currently, the main substrates used in the commercial cultivation of Phalaenopsis orchids are sphagnum moss and peat. However, peat is a non-renewable resource, and excessive extraction poses a risk of depletion. Therefore, based on local resources, seeking and exploring easily available, inexpensive, and alternative substrates to peat has become one of the research hotspots for Phalaenopsis orchid researchers. Thus, the author studied the changes in nutrient content of Phalaenopsis orchid plants under different substrate conditions using coconut coir and peat as substrates, as well as the nutrient absorption at different growth stages, aiming to provide data support for the replacement of peat with coconut coir in the cultivation of Phalaenopsis orchids and to offer references for reducing the cost of large-scale production of Phalaenopsis orchids.
Materials and Methods
The tested varieties were Phalaenopsis varieties 'Neishan 71' and '9#', provided by Jinan Qilin Flower Co., Ltd. Coconut coir was purchased from Xiamen Shengfang Ecological Technology Co., Ltd., soaked in clean water; peat was Danish Pindstrup peat.
The experimental methods were conducted from 2012 to 2014 in the intelligent greenhouse of the Vegetable and Flower Research Institute of the Shandong Academy of Agricultural Sciences. Two Phalaenopsis orchid varieties of the same age were selected and planted in new coconut coir and peat substrates. The experiment set up 4 treatments: T1: 'Neishan 71' + coconut coir, T2: 'Neishan 71' + peat, T3: '9#' + coconut coir, T4: '9#' + peat, with each treatment repeated 3 times, and 100 Phalaenopsis orchids planted in each repeat.
The internal environment of the experimental greenhouse had a shading degree of 50% to 70% (varying with the season), and humidity was maintained between 65% and 85%. Manual irrigation and fertilization were used, with 1.5-inch seedling pots irrigated with a 4000-fold solution of Shanghai Yongtong "Flower Without Defect" 20-20-20 balanced fertilizer, and 2.5-inch seedling pots irrigated with a 3000-fold solution of balanced fertilizer, until the 3.5-inch cups were induced to flower, irrigated with a 2000-fold solution of "Flower Without Defect" 10-30-20 fertilizer. Fertilizer and water were alternately irrigated.
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