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Optimization of Wormcast Mixed Matrix and Its Effect on Cucumber Seedling
- CUI Baowei
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2020, 49(7):
75-81.
DOI: 10.15933/j.cnki.1004-3268.2020.07.010
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The pig manure and mushroom residue were decomposed by earthworm,and mixed matrixes with different formulations(T1—T8,T1 for comparison)were designed with peat and vermiculite.By measuring chlorophyll content,root system activity,malondialdehyde(MDA)content,proline content,stem diameter,root-shoot ratio and seedling index of cucumber seedlings,effects of optimized wormcast on the growth and physiological characteristics of cucumber seedlings were studied,for the purpose of providing technical references for the development of new matrix for vegetable seedlings and recycling of waste resources.The results showed that,the physicochemical properties of wormcast mixed with substrate(T1—T8) all accorded with the requirement of vegetable seedling substrate,the bulk density was 0.21—0.32 g/cm3,the total porosity was between 61.04% and 75.35%,the pH value was between 5.81 and 7.42,and the conductivity was all lower than 2.5 mS/cm;organic matter content showed an upward trend with the increasement of wormcast proportion,and total nitrogen,total phosphorus,and total potassium contents showed a downward trend. According to the morphological and physiological indexes of seedlings,the treatment T5[ wormcast∶vermiculite∶peat( volume ratio)=1∶1∶1] was the best.Compared with the treatment T1[wormcast ∶vermiculite∶peat(volume ratio)=0∶1∶2],the plant height,stem diameter,root length,root-shoot ratio,and seedling index were significantly increased by 30.9%,8.1%,54.7%,26.7%,30.8%,and root system activity,chlorophyll content,MDA content and proline content were significantly increased by 40.1%,66.1%,68.4%,30.1%.