| Study on physical and chemical characteristics of compound substrate and effects on the growth of tomato seedling |
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| DOI：10.7606/j.issn.1000-7601.2014.05.024 |
| Key Words: spent mushroom compost physical and chemical characteristics seedling substrate path analysis |
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| Abstract: |
| Spent mushroom compost, cow dung and perlite were composed to five kinds of compound substrate, taking internationally best formula substrate (peat∶perlite=2∶1) as CK and tomato cv. Xinong No.2011 as the test plant, the physical and chemical characteristics of compound substrate and growth of tomato seedling were investigated and the physical and chemical characteristics of substrate and seedling index of tomato was carried out path analysis and multiple regression analysis,
moreover, we optimized the formula that was preliminary screened by test. This study indicated that the morphological trait, dry matter, root-shoot ratio and seedling index of optimizing formulating(spent mush∶cow dung∶perlite=3∶3∶4) are significantly higher than CK and preliminary o
ptimum formula; the main factors of affecting the seedling index of tomato seedling were bulk density, total porosity, aeration porosity and water holding capacity, the direct path coefficient of aeration porosity on tomato seedling is 2.2992, and influence of other factors on seedling index was negative. Incresing aeration porosity of compound substrate and decreasing bulk density, total porosity and water holding capacity are benefit the breeding of healthy tomato seedling. In order to produce good seedlings we can increase the dosage of cow dung and decrease the dosage of mushroom compost in this study. |
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