腐殖酸肥对砾土质戈壁区域林木生长促进的研究

Promotion of Humic Acid Fertilizer on Growth of Trees in Gobi Region of Gravel

以砾土质戈壁土壤为研究对象,通过对此类土壤分别施用不同量的农家肥(N)、腐殖酸有机肥(Fu),以空白(CK)为对照,进行林地土壤肥力测定,并对春季、夏季、秋季生长期生长量进行调查,以了解对砾土质戈壁区林木生长情况与土壤肥力变化关系。结果表明:土壤改良方面,处理6(腐殖酸有机肥3 kg株^-1)和处理3(农家肥3 kg株^-1)各项指标最优;处理5(腐殖酸有机肥2 kg株^-1)的树高、茎粗的增加量分别提高了16.27%、8.29%,处理3的这2项指标分别提高了16.94%、5.29%。在砾土质戈壁区域荒山造林中可按穴施肥,农家肥和腐殖酸肥料均以每株2 kg为宜,对林木促进生长效果最好,同时为降低成本,可将农家肥(N)、腐殖酸有机肥(Fu)搭配使用。

The adjustment of forest growth after different fertilization measures for gravel Gobi soil provides a theoretical basis for the scientific design and precise management of water and fertilizer under the soil conditions.Taking the gravel Gobi soil as the research object,the soil fertility of the forest was fertilized by blank(CK),farmyard manure(N)and humic acid organic fertilizer(Fu),respectively.The growth in the growth period in spring,summer and autumn was investigated to understand the relationship of change between growth and soil fertility.Through experiments,it was found that in terms of soil improvement,the indicators of treatment 6(humic acid organic fertilizer 3 kg per tree)and treatment 3(farmyard manure 3 kg per tree)are the optimal,but the result of growth adjustment shows that the results of treatment 5 increase significantly in both indicators,and the increase in tree stem height increase by 16.27%.8.29%,respectively.The two indicators of treatment 3 also increase significantly;the tree height and stem diameter increase by 16.94%&5.29%,respectively.In the barren soil of Gobi region,the afforestation can be conducted according to the acupoints.The farmyard manure and the humic acid fertilizer are suitable for 2 kg per tree,which is the optimal for promoting the growth of the trees.At the same time,in order to reduce the cost,the farmyard manure(N)and humic acid organic fertilizer(Fu)can be arranged in groups.