冻融循环作用下植被混凝土团聚结构变化对养分固持能力的影响

冻融循环作用下植被混凝土团聚结构变化对养分固持能力的影响

刘大翔, 刘德玉, 童标, 杨悦舒, 丁瑜, 许文年

Effect of aggregate structure change in vegetation concrete on nutrient retention ability under freeze-thaw cycles

Daxiang LIU, Deyu LIU, Biao TONG, Yueshu YANG, Yu DING, Wennian XU

表3 不同初始含水率与冻融循环次数下植被混凝土的主要养分含量

Table 3 Contents of major nutrient substances in vegetation concrete under different initial water contents and freeze-thaw cycles

初始含水率/%	冻融循环次数	主要养分含量/（mg·kg^-1）
初始含水率/%	冻融循环次数	有机质	铵态氮	硝态氮	有效磷	速效钾
18	0	14.99±0.85a	22.37±1.43a	16.89±1.12a	170.93±2.53a	189.82±1.61a
	1	16.86±1.23ab	23.26±1.65a	14.75±0.52b	187.86±2.92b	213.24±2.27b
	2	18.23±0.99b	24.15±0.97ab	14.23±0.36bc	200.45±1.83c	224.73±2.34c
	4	18.69±1.31b	26.47±1.37bc	13.96±0.43bcd	223.37±4.62d	238.94±1.92d
	8	18.31±0.88b	29.23±1.96c	13.65±0.61bcd	241.31±3.16e	256.71±3.04e
	16	18.09±0.91b	33.41±1.31d	13.38±0.26cde	245.29±2.65ef	260.54±2.65ef
	32	18.11±1.25b	37.94±2.01e	13.03±0.22de	247.18±3.05ef	263.15±1.46fg
	64	17.87±1.02b	39.15±1.45e	12.54±0.31e	249.79±2.64f	267.43±3.09g
对数拟合 y=alnx+b	a	0.1643	0.6157	-0.1920	3.6799	3.5675
	b	17.6760	29.6180	4.0160	221.4900	240.0200
	R²	0.8177	0.3740	0.8942	0.6269	0.7075
24	0	15.12±0.86a	22.81±0.99a	17.51±0.94a	174.80±1.69a	193.57±1.83a
	1	17.26±1.09b	23.47±1.09ab	15.54±0.68b	197.60±1.42b	224.19±3.12b
	2	18.73±1.17bc	24.69±1.35ab	14.50±0.59bc	208.49±2.31c	226.98±2.92b
	4	19.48±0.56c	26.31±1.63b	14.32±0.57bcd	225.46±2.53d	247.83±2.65c
	8	18.91±0.91bc	29.54±0.92c	13.65±0.67cde	244.00±1.68e	260.36±3.05d
	16	18.36±0.82bc	33.76±1.76d	13.37±0.34cde	249.90±3.24f	268.95±1.94e
	32	18.27±1.20bc	38.21±1.53e	13.21±0.51de	250.16±2.37f	270.14±2.68e
	64	18.09±1.04bc	40.18±1.96e	12.84±0.48e	257.32±2.68g	271.23±2.46e
对数拟合 y=alnx+b	a	0.1755	0.6172	-0.2150	3.7268	3.6792
	b	18.0620	29.9920	14.3250	226.6900	246.1200
	R²	0.7415	0.3594	0.8534	0.6798	0.7410