添加碳酸盐岩对好氧堆肥发酵过程、养分和腐熟度的影响

Effects of carbonatite addition on aerobic composting process, nutrients and maturity

为探索农用矿物"西班牙河"碳酸盐岩作为堆肥添加剂对堆肥发酵效果的影响,以动物源堆肥(猪粪堆肥)和植物源堆肥(包菜堆肥)为例,研究碳酸盐岩对堆肥发酵过程(堆肥温度、有机碳动态、全氮动态、碳氮损失)、堆肥产品养分(全氮、全磷、全钾、全钙、全镁)和腐熟度(电导率、种子发芽指数)的影响。试验设置不添加碳酸盐岩对照和添加碳酸盐岩两个处理。结果表明:猪粪堆肥中,与对照相比,添加碳酸盐岩处理堆肥整个发酵阶段平均温度、碳损失、氮损失、全磷、全钙、全镁、种子发芽指数分别提高了2.0%、16.1%、56.2%、16.5%、189.8%、26.6%、5.3%,全氮、全钾、电导率分别降低了18.9%、14.2%、27.3%。类似的,添加碳酸盐岩后,包菜废弃物堆肥整个发酵阶段平均温度、碳损失、氮损失、全磷、全钙、全镁、种子发芽指数分别提高了0.7%、21.1%、169.1%、186.6%、164.0%、148.7%、6.3%,全氮、全钾、电导率分别降低了26.4%、18.5%、38.3%。因此,碳酸盐岩一方面促进了堆肥发酵,提高堆肥安全性及磷、钙、镁含量,但另一方面也加剧了碳、氮、钾损失。

The aim of this work was to explore the effects of agricultural mineral" Spain River" carbonatite(SRC), as an inorganic compost additive, on composting process and quality of animal-and plant-derived compost.Two treatments,without SRC(Control)and with SRC,were set up at pig manure compost and cabbage waste compost.The compost temperature profile, dynamics of organic carbon(C)and nitrogen(N), C and N loss were used to depict the composting process, and total nitrogen(TN), total phosphorus(TP), total potassium(TK), total calcium(Ca), total magnesium(Mg), electrical conductivity(EC), germination index(GI)were observed to evaluate the end-product quality.In the composting of pig manure, compared to the control, SRC addition increased the average temperature of entire composting period, C loss, N loss, TP, Ca, Mg and GI by 2.0%, 16.1%, 56.2%, 16.5%, 189.8%, 26.6%, 5.3%, and decreased TN, TK and EC by 18.9%, 14.2% and 27.3%, respectively.Similarly, in the composting of cabbage wastes, SRC addition increased the average temperature of entire composting period, C loss, N loss, TP, Ca, Mg and GI by 0.7%, 21.1%, 169.1%, 186.6%, 164.0%, 148.7%, 6.3%,and decreased TN, TK and EC by 26.4%, 18.5% and 38.3%, respectively.In conclusion, SRC, as an inorganic compost additive, accelerated the composting process and improved the content of P, Ca, Mg and the safety of end-product, but increased the loss of C, N and K.