In this work,we tested four nutrient solution formulas,two kinds of climbing things and height,two kinds of soilless substrate formula,and two type partitions between soilless media and soil on Vanilla fragrans.Based on these results,two kinds of nutrient solution formula were selected preliminarily suitable for soilless cultivation of V.fragrans.Further,these are verified the organic substrate favorable to the growth and development of V.fragrans.Then,the author creatively analyzed these results and put forward the concept that the bionic climbing cultivation techniques with the artificial shade and a preliminary research program on V.fragrans.
The nutritional status of Vanilla (Vanillafragrans or V. planifolia) culture on soilless substrate were tested. The results indicated that the nutrient content of vanilla is different after the application of different nutrient solution. The N content in leaves was in the appropriate range when use A3 nutrient solution and the control A5, while it deficiency in A1, A2 and A4 nutrient solution; in addition to the control A5 that the K content in leaves was lack, there is a high K content in the other four nutrient solutions; the P, Ca and Mg content in leaves was lack in all nutrient solutions, and Ca and Mg content lack serious. The serious imbalance in the ration of nutrient in leaves was observed in all nutrient solutions. From the nutrient content, in order to adjust the nutrient solution more appropriate should be based on the formula A3; while from the nutrient balance, the formula A2 is the best in the all types of formulations.
Costus speciosus was used as source for preparing pickled vegetable,dry salted pickles and dry crackers,which are found to be health food.
Top buds of branches of Costus speciosus were used for cutting for mass propagation of planting materials,and the cuttings had a survival rate of 95.6%～98.9%.Cultural patterns were also tried and selected,and the results found that planting under net shade was an optimum cultural pattern.Cuttings grown under the net shade yielded as high as 60 600 kg/ha of fresh tuber.
Ninety seven samples of a multi-purpose plant Costus speciosus were collected at different locations and at various harvesting time,and their saponin contents were determined.Determination showed that the saponin contents in all the 97 samples failed to meet the index requirement for commercial use(1.0%).This indicates that C.speciosus that is expected to use as industrial material for production of diosgenin should be reconsidered.
云南热区发展香蕉生产具有比较优越的自然环境条件.20世纪90年代初,生产上主要是采用地下吸芽苗进行繁殖,其产量低,病虫害严重,经济效益较差;90年代中期,香蕉试管苗因其生长迅速、病害少、抽蕾整齐、收获期集中、品质优、管理方便等优点而被广大蕉农所接受.现在使用脱毒组培苗已成为香蕉高产、稳产、高效益的关键措施之一.但长期以来,云南种植的香蕉组培苗主要来自广西、广东等地,远距离运输成本高,严重地制约着我省香蕉产业的稳步、健康发展.
