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 Wysłany: Nie 22:49, 30 Sty 2011 Temat postu: Incubation of tobacco cultivars K326 Potassium Abs |
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Incubation of tobacco cultivars K326 Potassium Absorption and Accumulation
The results reported below. 1 Materials and methods 1.1 Materials for the test crop of winter wheat varieties, nitrogen as urea, phosphorus as superphosphate. 1.2 The test methods experiment of winter wheat grown continuously in the testing ground for our agricultural and soil to cover the black clay soil, topsoil containing organic matter 13. O0g/kg, TN 1.17g/kg,[link widoczny dla zalogowanych], nitrogen 85mg/kg, available P 25rag/kg,[link widoczny dla zalogowanych], K 168mg/kg. Experiment with 3 treatments, ① no fertilizer (CK); ② facilities N112.5kg/hm, P2O580.0kg/hm (abbreviated as NlP1); ③ facilities N180.0kg/hm, P2O5100.0kg/hm (abbreviated as NP) . Where N 2 / 3 as basal, 1 / 3 as top dressing; P all base facilities. Plot area of 66.7m, repeated 4 times, randomized block arrangement. Post-harvest experimental plots of winter wheat by single-income singles total production, while soil samples were collected topsoil (0 ~ 20cm), measurement of soil total nitrogen (semi-micro Kjeldahl method),[link widoczny dla zalogowanych], total phosphorus (molybdenum antimony resistance method), alkaline solution nitrogen (alkaline solution diffusion method),[link widoczny dla zalogowanych], phosphorus (0.5M ammonium bicarbonate extraction of a Mo-Sb resistance method), plant total N (indophenol blue colorimetry), total phosphorus (vanadium molybdenum yellow method) . Received Date :2002 -09-02; revision date: 2002 A l1-26 Author: Zhijun (1963 a), male, Xifeng, senior agronomist, is mainly engaged in research in dryland agriculture. Tel: (0934) 8453235. Uptake and accumulation were mainly in the vigorous, mature tobacco dramatically reduces the absorption of potassium, and even the root cause excretion of potassium decreased accumulation of the phenomenon. . The results of our study show that in the absence of water, nutrient stress conditions, the mature tobacco plant uptake of potassium rather large,[link widoczny dla zalogowanych], accounting for about 50 or so to the total, indicating that growth in the late adequate K supply increased potassium content of tobacco is very useful. 3.2 solution culture conditions, potassium is sufficient for 21d after budding leaf potassium content can be maintained at a high level of more than 5.00, indicating that species in tobacco K326 puppets increase in the potassium content of plant potential is considerable. potassium content of tobacco leaves from the improved perspective on the current management and cultivation of natural climate constitute a comprehensive system also be improved.
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