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利用盆栽试验,研究施入不同比例的泥炭、风化煤对风沙土的改良作用及其促进樟子松幼苗生长的效果,并初步分析了两种有机物料的作用机理。试验结果表明,泥炭和风化煤都显著地改良了风沙土的理化性质,随着施入量的增加,两者对风沙土的影响都表现出土壤pH值下降、持水量增加、养分含量提高,且泥炭的效果普遍比风化煤的效果要好;两者均促进了樟子松幼苗生长。不同含量的泥炭对促进樟子松幼苗生长(苗高、地径、根长、生物量)的效果表现为8%>10%>5%>2%>0。不同含量的风化煤对高生长的影响依次是5%>8%>10%>2%>0,对地径生长的影响依次为5%>8%>2%>10%>0,对生物量的影响依次为5%>2%>8%>10%>0。总的来看,泥炭的效果比风化煤好。结合樟子松在沙地中的生长特性,推断泥炭和风化煤中含有微量抑制樟子松生长的物质,并提出8%的泥炭与风沙土之比是促进沙地樟子松幼苗生长的最佳配比。
Pot experiments were conducted to study the effects of peat and weathered coal with different proportions on aeolian sandy soil and their effects on seedling growth of Pinus sylvestris var. Mongolica. The mechanism of action of two organic materials was also analyzed. The results showed that both peat and weathered coal significantly improved the physical and chemical properties of aeolian sandy soil. With the increase of applied amount, both the effects of aeolian sandy soil and aeolian sandy soil on aeolian sandy soil showed a decrease in soil pH, an increase in water holding capacity and an increase in nutrient content, The effect of peat is generally better than that of weathered coal; both of which promote Pinus sylvestris seedling growth. The effects of different contents of peat on the growth of Pinus sylvestris seedlings (seedling height, diameter, root length and biomass) were 8%> 10%> 5%> 2%> 0. The effects of different contents of weathered coal on the growth were 5%> 8%> 10%> 2%> 0, followed by 5%> 8%> 2%> 10%> 0 on the growth of soil. The impact of the amount of 5%> 2%> 8%> 10%> 0. In general, peat is better than weathered coal. Combined with the growth characteristics of Pinus sylvestris var. Mongolica in sandy land, it is inferred that peat and weathered coal contain trace substances which inhibit the growth of Pinus sylvestris var. Mongolica and propose that the ratio of peat to aeolian sandy soil is 8% Good ratio.