摘要
采用室内土柱模拟分析方法,研究了不同剂量的腐植酸对一定比例的混合沙土保水保肥能力的改良效果。试验结果显示:添加0、4、8、12 g的腐植酸,土柱淋溶液总渗透时间分别为1.6、9.4、16.0、35.0 h;淋溶液中有效磷总量分别为182.0、148.5、122.5、92.5μg;铵态氮总量分别为266、244、178、142μg。与对照相比,磷酸二铵溶液在添加腐植酸的土柱中渗透更慢,且渗透速率随腐植酸添加量的增加而减慢;淋溶液中的铵态氮与磷总量随腐植酸添加量的增加而显著减少。结果表明,腐植酸能显著提高混合沙土的保水与保肥能力。
By indoor soil column simulated analysis method, the effects of different doses of humic acid on the reten- tion capacity of a certain proportion of mixed sandy soil with water and fertilizer was studied. The experimental results showed that adding 0, 4, 8, 12 g humic acid, soil column leaching solution infiltration duration is respectively 1.6, 9.4, 16.0, 35.0 h; Total effective phosphorus in leachate is respectively 182.0, 148.5, 122.5, 92.5 μg; Ammonium nitrogen amount in leachate is respectively 266, 244, 178, 142 μg. Compared with controls, diammonium phosphate solution after adding humic acid in the soil column infiltrated more slowly and the infiltration rate decreased with the increase of adding amount of humic acid, leaching solution of ammonium nitrogen and total phosphorus significantly decreased with the increase of adding amount of humic acid. The results showed that humic acid could significantly improve the water and fertilizer retention capacity of the mixed sandy soil.
出处
《腐植酸》
2015年第6期25-28,40,共5页
Humic Acid
关键词
腐植酸
沙土
保水保肥
humic acid
sandy soil
water and fertilizer retention
