Study On The Growth And Developing Characteristics Of Flax Sowing In Winter In Red Soil Regions Of Southern China

1. The stem heights ,the stem diameters and the stem weights respectively account for 46.25%,24.10% and 63.40% of all during the blooming stage, which is the peak period of the accumulation of the flax economic yield and the key period of bloom and seed , of flax sowing in winter in red soil regions of south china. That is different obviously between the winter flax of south china and the flax of north china. The weights of the root and leaf present the low-high-low variations and get the highest level at first bloom stage and bloom stage, then decreases as the result of the aged plant, the root fracture and leaf senescence. The growing characteristics are basically the same as the north china.2. At the beginning the bloom, metabolizing N, P, K are rich, and the collection of N, P2O5, K2O is very considerable. In the later period of bloom, P2O5, N, K2O in the stem are still increasing continually while decreasing in root. Compared with the content, the collection and its intensity of N, P2O5,K2O among roots, stems and leaves, stems always take the first place. Then leaves, which followed by roots, the rations are 1:5.12:2.44, 1:6.86:4.75,1:14.06:2.40.3. the variation of root oxidized ability, active absorbing area, chlorophyll content is not obvious, and the content of chlorophyll is above the 75% of the whole content. The bands of fiber cells, the number of cells per bands, lodges of fiber cells get a stability, and the increase of the number of fiber cells dependents on the invasion of fiber cells. The fiber diameter increases quickly to a steady state in the beginning of bloom hi the later bloom period, the cellwalls of fiber cells become thick, in the later April, flax phloem fiber cells mature.4. the variation of the number of the capsule seeds, seed setting percent is not obvious. Capsules per a plant, bud weights, weights per 1000 seeds and oil ration increase with the procedure of growth, 20 days before the bloom is the rapidest period, then slower down until the blooming stage when the seeds matured. The differentiation of flax buds at the shoots is pretty late; and high temperature may influence it badly. It can lead to the unfertilized anther and the death of bud capsule per plants is always very low.