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AbstractSpent 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.
文章编号： 0258_7106 (2016) 01_0018_15 中图分类号： P618.41 文献标志码：A
**通讯作者耿新霞， 女， 1979年生， 助理研究员， 成矿规律研究方向。 Email： gen email@example.com
WANG Peng-bo, LI Jian-ming, DING Juan-juan, LIU Guo-ying, DU Qing-jie, PAN Tong-hua, CHANG Yi-bo.Study on physical and chemical characteristics of compound substrate and effects on the growth of tomato seedling[J].杂志名称,2014,21(5):137-142