Sweet Pepper, Organic Growing Media

The experiment used hou pi jiao wang sweet pepper as the experiment material, studied the characteristics of uncomposed corn straw applied as substrate. At the same time, chicken manure, pig manure, deer manure and sterilized chicken manure contrast experiment was conducted on sweet pepper cultivated in uncomposed com straw substrate. There were 11 treatments. The ratio of corn straw and cinder was 10 (1), 9:1 (2), 8:2(3), 7:3 (4), 6:4 (5) respectively, sterilized chicken manure 5066.2Kg ·667m-2 was used in treatments from 1 to 5. The ratio of corn straw and cinder was 8:2, chicken manure 6380.2 Kg · 667m-2 (6), pig manure 6960.1Kg · 667m-2 (7), deer manure 10440.5Kg ·667m-2 (8) was used respectively. The ratio of corn straw and soil was 8.5:1.5 (9), 7:3 (10), sterilized chicken manure 5066.2Kg · 667m-2was used respectively. The control (11) sweet pepper were planted in soil, sterilized chicken manure 5066.2Kg · 667m-2was used.1 uncomposed com straw has its own advantages as source-wided, regenerate, environmentally sound organic substrate in northeast of China.1.1 The temperature of substrate was increased when corn straw decomposes. Substrate dekad temperature of May is higher than that of soil 1.14 2.65 It is beneficial for planting ahead.1.2 The substrate releases CO₂ when decompose. CO₂ concentration of substrate is higher than of soil. It is beneficial for photosynthesis of sweet pepper.2 There are factors which limit the application of uncomposed corn straw as substrate in vegetable cultivation. The film of substrate was too thin at the mid-late growth stage. There was no enough space for root to grow .Anchor effect was bad and sweet pepper was easy to be infected. The other is water/gas ratio was too high, aeration condition was bad at mid-late growth stage. Root can not adapt to the habitats . Root vigor was reduced significantly. It is difficulty to harmonize the conflict between irrigation and aeration .Bulk density become higher and total porosity became lower when corn straw decomposed. The change of bulk density and porosity caused the film of substrate too thin. Substrate was in acidity condition at early growth stage and in alkalinity condition at mid-late growth stage.3 The height, width of stalk of control is higher than that of substrate significantlyabout tow month after plant while the difference was not significantly before. The dry, fresh weight of aerial part of control is higher. The dry, fresh weight of root of control and substrate is similar. The R/T of control is lower than that of substrate. The number of fruit per plant of control was higher significantly. The field of control and substrate has no significantly difference at early stage. The increase of field of substrate is lower at mid-late stage. So the total yield of substrate is lower significantly.4 Nitrate content of sweet pepper cultivated in substrate is lower than 432i g ·Kg-1, which is the standard of greenfood. Soluble sugars, Vc content are all higher.5 The released content of N, K of substrate is lower. The absorbed content of N, P and K of substrate is lower. The absorption ratio of P, K is higher than that of soil.6 The total number of microbiology of substrate is higher than that of soil. The ratio of (bacteria +antinomies)/fungi of substrate are lower.7 Addictive cinder or soil can improve the stability. With the rising in additive cinder or soil, the stability of substrate increased. The released content of N, K is higher. The absorption content of N, P, and K is higher. Its microbial flora is better. Stability effect became less along with decomposition .The stability effect of cinder or soil was not significant in the arrangement scale in whole growth period.8 The yield of chicken manure, pig manure and deer manure treatment has no significant difference from sterilized chicken. The number of fruit per plant, the average weight per plant and the root vigor of different organic manure treatment are all have no significant difference. The nitrate content o...