| This experiment used sweet pepper of large fruit as experimental material which differs from the normal species. Through the measurement of the biological characteristics, carry on cultured the sweet pepper using nutrient solution and soilless substrate with the soil cultivation as contrast( CK), study mainly environmental condition,growth and development and the physiological ecosystem effect of substrate cultivation on sweet pepper of protected culture. The aim of experiment is inquiring into the physiological and ecological effect and application result of substrate culture, selected the new soilless substrate for sweet pepper cultivation, and provide the solution to culture efficiently for the sweet pepper of protected culture and to process factory and agricultural wastes.The pearl rock, vermiculite, sand, slag, dispoinsed chicken muck and edible germ waste, etc. are selected as protected soilless substrate in this Experiment. studied the different cultured substrate on the growth and development , physiology and photosynthesis characteristics in sweet pepper. the Experimental results show that The organic ecosystem culture is of nutrient balance of the formulation which can be used to crop efficiently. So, sweet pepper grew strongly, nutrient balance of substrate can imply a great deal of large and micro element, is a more ideal substrate formulation to culture sweet pepper.(1) The physics and chemistry property have the obvious difference because of the gradients difference various substrates formulation in this experiment. the S3 and the S4 treatments were of good physics and chemistry property the biggest value in BD for the S1, amounted to the 1.56 g.cm-1, the next CK in order, the least value for the S3, the TP and BD are in contrary order. then value of BD and EC increase slightly, and the value of pH has no different variety .but water using efficiency of CK is good. add mushroom waster has a boost production on sweet pepper if P deficiency in interacte.(2) Carrying on the difference analysis and comparison in various index growth and development of sweet pepper, the results showed: The CK is lower than other treatments, for example, number of fruit per plant increased, yield hanced, date of bloom advanced.(3) Net photosynthesis rate of sweet pepper raised slowly according to time prolong. The maximum value appeared at about 11:30, S4 can amount to 30.6 highly. then temperature go up(>38℃) , concentration of CO2 descend. so, photosynthesis is inhabited , Pn begin descending, the second peak value emerged at about 14:00.Midday depression of photosynthesis can be related through soilless substrate culture.(4) Intercellular CO2 concentration decreased with timing progress, but reduced strongly at 10:30-11:30, then raised to little degree. Under the condition of various treatments, the AQY of sweet pepper is CK< S1< S2< S3< S4 in order. Tr and Gs are correlated, the correlated formula is Tr=836.47 Gs-63.81( r=0.8376), Gs will increase with Tr adding. The Gs has no influence on Pn and Ci directly, mainly be affected by leaf age and nourishment of leaf.(5) Through computer program model, correlated formula of light saturation point and PAR can be calculated through computer procedure model, S3 and S4 are higher than others, amounting to 1186.51μmol.m-1.s-2 and 1195.43μmol.m-1.s-2 respectly.(6) N content of leaf has influence on Gs greatly, the correlated formula is Y=65.13-397.43 Gs( r=0.9532). water potential of leaf is of decreasing trend, negative correlated with the Tr. The highest water use efficiency is for S4, amounting to 87.34%, which has important meaning to improving anti-drought and saving water for irrigation.
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