| Aimed at spring seedling difficult issues in the Inner Mongolia loess plateau, under the two conditions of anti-canopy and a potted,311-A regression design method was used, to study the effect on oats and millet of drought Seedlings in different soil moisture、 concentrations of fulvic acid seed soaking and water injection, to establish a nonlinear regression equation aimed at germination rate of three factors objective, to reveal the mechanism on oats and millet drought seedlings of three factors, to provide a theoretical basis and technical support for the region seedling planting drought. The main findings following:1、Under the combined effect of fulvic acid seed soaking and water injection, seedling emergence, plant height, stem diameter on oats and millet were improved. Oat seedling emergence, plant height, stem diameter were increased 8%～29%,2.41%～ 61.72%,41.4%～152.80%; Milllet seedling emergence, plant height, stem diameter were increased 15%～122%,42.28%～1.54%,19.23%～85.59%.2、Fulvic acid soaking combined water injection can effectively regulate oats and millet osmotic adjustment system、embrane systems and protective enzyme system. The content of free proline, soluble protein, superoxide dismutase (SOD), peroxidase (POD) of oat were increased respectively 21.90%-113.90%,6.89%-58.74%,7.16% 80.42%,3.35%-146.12%, content of MDA decreased 0.85%-32.35%, relative conductivity decreased 13.64%～51.02%; The content of free proline, soluble protein, superoxide dismutase (SOD), peroxidase (POD) of milllet were increased respectively 9.94%～75.36%,5.04%～50.25%,4.80%～48.07%,18.29%～111.25%, content of MDA decreased 3.79%～32.31%, relative conductivity decreased 12.28%～71.79%.3、Single factor effects the emergence rate on the oat and millet was soil moisture> water injection> fulvic acid soaking. Three factors mathematical model optimizated, when concentration of soaking fulvic acid was 0.22%, water injection was 0.49L/m2 and soil moisture was for 71.25% of field capacity, emergence rate oat reached a maximum in each single factor, namely 90.76%、91.72%,93.27%; when concentration of soaking fulvic acid was 0.28%, water injection was 0.23L/cave and soil moisture was for 41.69% of field capacity, emergence rate oat reached a maximum in each single factor, namely 90.59%、 90.72% ' 90.48%.4、Two-factor interactions when soil moisture was in 62.11% of field capacity the combined concentration of fulvic acid Soaking 0.22% ,the effect to increase the seeding rate of oat is better of 93.05%; soil moisture was in 45.95% of field capacity combined concentration of 0.29% fulvic acid soaking, millet seeding rate reached a maximum of 90.59%. Two factors interacted, fulvic acid soaking and water injection, water injection and soil moisture, fulvic acid soaking and soil moisture were interacted on oat, while only fulvic acid soaking and water injection have interaction for mille.5、Seeding rate of oats and millet can significantly improved in fulvic acid soaking, water injection and soil moisture. After simulation optimization, fulvic acid soaking was 0.23% , water injection was 0.47L/m2, soil moisture field was in 68.85% of capacity, seeding rate of cat reached to 94.13%; fulvic acid soaking was 0.27%, water injection was 0.23L/cave, soil moisture field was in 46.5% of capacity, seeding rate of millet reached to 91.05%.6、Soaking with fulvic acid can achieve the effect of water-saving and drought seedling. Under the single factor, the optimum concentration of fulvic acid soaking, was 0.22%, oat seeding rate reached to 84.76%, if not soak, need water 0.71L/m2. When the optimum concentration of Soaking was 0.28%, the millet seeding rate reached 90.59%, if not soak, need water 0.21L/cave. |
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