Reaserch On The Seeding-raising Technique In Substrate And Nutritional Physiology During The Germination Of Tea Seed

In this research, ingredients of mediums, seedling cultivation containers and nutrients uptake were analyzed by using tea seeds of Fu Ding Da Bai variety as materials. From organic medium ingredients, which include peat, perlite, quartz sand, chicken manure and gneiss weathered soil, three medium formulas were chosen by the theory. Then, based on influences of these three mediums on growth of tea seedlings and physiological characteristics, the optima medium of these mediums was identified. Furthermore, seedling cultivated container was also chosen considering to growth of tea seedlings. Additionally, nutrients uptake of tea seedlings were also evaluated at different growth period. Result shows:1 Nine kinds of different substrates were studied by using peat, quartz sand, perlite, gneiss weathered soil, chicken manure, cattle manure and rice huskas raw as materials. The result showes that the physicochemical and cushioning properties of peat: quartz sand: perlite=2:1:1, peat: quartz sand: perlite=3:1:1 and peat: gneiss weathered soil: chicken manure = 3:1:0.5 could meet the seedling development requirement,and they can be used as basic medium formulas to conducted the field selection.2 The results show that the best combination for the growth of root was peat: quartz sand: perlite=3:1:1. However, the optimal combination for shoots development is peat: quartz sand: perlite=2:1:1. which showed suitable physical structure for the growth environment, the plant height, stem diameter, leaf area, internode length, dry weight of stem and leaf, chlorophyll content and leaf net photosynthetic rate were superior to the others.3 32 and 50 holes of aperture disk limited the growth of tea seedling root, and then influenced the growth of tea seedlings. Cultivation bed provides more appropriate environment compare to other cultivation containers considering to seedling growth indicators. Indicators include plant height, stem diameter, leaf area, internode length, biomass, chlorophyll content and leaf net photosynthetic rate. 4 pH decreased and kept about 4.2; EC became smaller. The absorption of various elements keep at a relatively low level one month after sowing, and it is maintained at a higher level from late May to late July. At the same time the peak value of maximum absorption appears: NH₄⁺-N was 6.72 mg/plant, NO₃^--N was 0.78 mg/plant, P was 0.796 mg/plant, K was 10.75 mg/plant, Ca was 5.13 mg/plant, Mg was 0.26 mg/plant, Fe was 69.07 ug/plant, Mn was 222.88 ug/plant, Zn was 106.36 ug/plant. The rule of total uptake of elements as follows: K>N>Ca>P>Mg>Mn>Zn>Fe.