| Taking wormcast mixed with peat, corncob, vermiculite, several organic and inorganic fertilizers as the material, we studied the influence of different substrates and fertilizer formula on the growth and the physiological characteristic of muskmelon, pumpkin and cucumber seedlings. We want to several new type substrates be select by the experiment, on each of them, the muskmelon, pumpkin and cucumber seedling can grow well. The important results as following:1. The study of substrates and fertilizer forms for muskmelon: Though overall measurement by seedling index and G value etc., the compound substrate M5 (750 dm/m3 wormcast +250 dm/m3 corncob +12.5kg/m3 drying chicken manure) and M4 (750 dm/m3 wormcast +250 corncob +10.0kg/m3 drying chicken manure) M5 and M4 can be used to product the seedling of muskmelon instead of CK(Peat: Vermiculite=2:1).2. The study of substrates forms for pumpkin and cucumber: We recommend the substrates of 750dm/m3 wormcast+250dm/m3 corncob +12.5kg/m3 dried chicken manure and 250dm/m3 wormcast +250dm/m3 corncob +250dm/m3 peat +250dm/m3 vermiculite +12.5kg/m3 dried chicken manure for pumpkin seedling, and recommend the substrate (750dm/m3 wormcast +250dm/m3 corncob +12.5kg/m3 dried chicken manure) for cucumber seedling.3. Using the selected substrates formula(250dm/m3 wormcast +250dm/m3 corncob +250dm/m3 peat +250dm/m3 vermiculite), we studied the relationship of N and P quantities of nutrient supply on the pumpkin seedling index by means of quadratic general rotational. By the frequency analysis and the seeking of optimized region, we got the following results: The cucumber seedling index is 0.420, when the lever of N and P2O5 is 0 and 0(0.8 and 0.7 kg/m3 );The pumpkin seedling index have 95% possibility above 0.30 when X1 region is 0.176～1.189, and X2 region is -0.029～0.829.4. Using the selected media formula(750 dm/m3 wormcast +250 dm/m3 corncob), we studied the relationship of N and P quantities of nutrient supply on the cucumber seedling index by means of quadratic general rotational. By the frequency analysis and the seeking of optimized region, we got the following results: The cucumber seedling index is 0.420, when the lever of N and P2O5 is 0 and 0(0.8 and 0.7 kg/m3 );The cucumber seedling index have 95% possibility above 0.40 when X1 region is -1.038～-0.101, and X2 region is -1.038～-0.101.
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