Effects of Combined Application of Amino Acid Fertilizer and Urea on Soil Active Organic Carbon Fractions and Enzyme Activities in Pepper

doi:10.7668/hbnxb.20194584

Abstract

Abstract:

In order to explore the effects of combined application of amino acid fertilizer and urea on soil active organic carbon components and enzyme activities in pepper,and to clarify the fertilization mode to increase the content of soil active organic carbon components in pepper.Seven treatments were set up,including no fertilization(CK),single application of urea(N0),80% urea + 20% amino acid fertilizer(N20),60% urea + 40% amino acid fertilizer(N40),40% urea + 60% amino acid fertilizer(N60),20% urea + 80% amino acid fertilizer(N80)and single application of amino acid fertilizer(N100).The changes of soil physical and chemical properties,soil active organic carbon content and enzyme activity under each treatment were studied.The results showed that the combined application of amino acid fertilizer and urea could effectively increase the contents of nitrogen,phosphorus and potassium,organic matter,enzyme activity,organic carbon and its active components in soil.The content of soil organic carbon increased with the increase of amino acid fertilizer application,and the content of soil active organic carbon components and enzyme activity increased first and then stabilized or decreased slightly with the increase of amino acid fertilizer application.The soil easily oxidized organic carbon content,particulate organic carbon content,microbial biomass carbon content,cellulase activity,catalase activity and amylase activity of N60 treatment were the best:in 0-20 cm soil layer,compared with CK treatment,they were increased by 105.50%,19.43%,142.60%,126.57%,22.28% and 308.20%,respectively.In the 20-40 cm soil layer,compared with CK treatment,it increased by 39.75%,59.32%,59.00%,130.27%,33.24% and 342.16%,respectively.Correlation analysis showed that soil total organic carbon and active organic carbon components were significantly positively correlated with enzyme activity.It can be seen that the combined application of amino acid fertilizer and urea can effectively improve the soil active organic carbon content and enzyme activity in pepper,and the treatment of 40% urea combined with 60% amino acid fertilizer has the greatest potential for improvement.

Key words: Pepper-soil, Amino acid fertilizer and urea, Soil active organic carbon, Soil enzyme activity

ZANG Longfei, HAN Guojun, YANG Xiaobing, HOU Guowen, WANG Junxia, GONG Chenchen. Effects of Combined Application of Amino Acid Fertilizer and Urea on Soil Active Organic Carbon Fractions and Enzyme Activities in Pepper[J]. Acta Agriculturae Boreali-Sinica, 2024, 39(S1): 187-194. doi: 10.7668/hbnxb.20194584.

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References 36

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土层/cm Soil layer	pH	电导率/ (μS/cm) EC	全氮/ (g/kg) TN	有机质/ (g/kg) OM	全磷/ (g/kg) TP	速效磷/ (mg/kg) AP	速效钾/ (mg/kg) AK
0~20	8.46	1 365	0.837	10.14	0.17	30.15	65.27
20~40	8.51	1 389	0.622	9.31	0.12	26.24	51.23

土层/cm Soil layer	pH	电导率/ (μS/cm) EC	全氮/ (g/kg) TN	有机质/ (g/kg) OM	全磷/ (g/kg) TP	速效磷/ (mg/kg) AP	速效钾/ (mg/kg) AK
0~20	8.46	1 365	0.837	10.14	0.17	30.15	65.27
20~40	8.51	1 389	0.622	9.31	0.12	26.24	51.23

土层/cm Soil layer	处理 Treatment	pH	电导率/ (μS/cm) EC	全氮/ (g/kg) TN	碱解氮/ (mg/kg) AN	有机质/ (g/kg) OM	全磷/ (g/kg) TP	速效磷/ (mg/kg) AP	速效钾/ (mg/kg) AK
0~20	CK	8.43±0.01a	1 377.33±9.02d	0.91±0.01c	42.77±2.34c	14.18±0.58a	0.24±0.02b	36.31±1.42d	64.67±2.52d
	N0	8.41±0.06a	1 424.33±11.24d	1.01±0.01b	53.53±3.86b	14.30±0.44a	0.32±0.01ab	44.36±5.63c	74.00±4.00c
	N20	8.22±0.14b	1 368.33±32.52d	1.19±0.11a	60.62±2.56a	14.71±0.68a	0.35±0.08a	58.25±6.70b	82.33±3.79b
	N40	8.26±0.09b	1 765.00±20.22c	1.01±0.01b	56.63±2.66ab	14.83±1.01a	0.29±0.08ab	50.68±3.07c	94.33±3.51a
	N60	8.33±0.02ab	1 816.67±59.87c	1.00±0.01b	52.31±0.43b	14.99±0.76a	0.27±0.05ab	33.92±2.23d	79.67±5.51bc
	N80	8.28±0.02b	2 112.33±73.19a	0.92±0.03c	55.65±2.46b	15.29±1.46a	0.32±0.03ab	50.58±5.38c	90.00±3.46a
	N100	8.34±0.02ab	1 995.00±53.39b	1.01±0.01b	55.95±3.10b	16.08±0.96a	0.27±0.03ab	67.25±4.81a	80.00±5.29bc
20~40	CK	8.44±0.04bc	1 465.33±16.17e	0.65±0.01e	37.29±0.90c	10.48±0.49b	0.11±0.01d	11.98±1.79c	56.00±4.58c
	N0	8.57±0.10a	1 538.67±5.51de	0.95±0.01a	42.44±0.77a	11.47±0.61ab	0.24±0.03abc	15.24±0.44c	67.00±4.36b
	N20	8.49±0.01abc	1 560.00±39.28d	0.88±0.02c	40.83±1.05ab	11.50±1.46ab	0.33±0.12a	17.92±4.40bc	67.00±3.46b
	N40	8.48±0.06abc	1 705.00±19.97c	0.90±0.01b	38.55±0.66bc	11.51±1.00ab	0.18±0.04bcd	14.28±2.24c	80.00±3.61a
	N60	8.51±0.01ab	1 658.67±67.52c	0.92±0.01b	39.55±2.62bc	11.42±0.96ab	0.28±0.09ab	23.86±3.46ab	67.33±4.04b
	N80	8.40±0.03c	1 837.67±31.39b	0.74±0.02d	43.47±2.84a	11.80±0.16ab	0.19±0.03bcd	23.96±5.91ab	77.67±2.08a
	N100	8.48±0.04abc	1 982.33±88.64a	0.73±0.02d	36.73±0.91c	12.44±0.13a	0.15±0.04cd	30.28±8.50ab	67.33±6.03b

土层/cm Soil layer	处理 Treatment	pH	电导率/ (μS/cm) EC	全氮/ (g/kg) TN	碱解氮/ (mg/kg) AN	有机质/ (g/kg) OM	全磷/ (g/kg) TP	速效磷/ (mg/kg) AP	速效钾/ (mg/kg) AK
0~20	CK	8.43±0.01a	1 377.33±9.02d	0.91±0.01c	42.77±2.34c	14.18±0.58a	0.24±0.02b	36.31±1.42d	64.67±2.52d
	N0	8.41±0.06a	1 424.33±11.24d	1.01±0.01b	53.53±3.86b	14.30±0.44a	0.32±0.01ab	44.36±5.63c	74.00±4.00c
	N20	8.22±0.14b	1 368.33±32.52d	1.19±0.11a	60.62±2.56a	14.71±0.68a	0.35±0.08a	58.25±6.70b	82.33±3.79b
	N40	8.26±0.09b	1 765.00±20.22c	1.01±0.01b	56.63±2.66ab	14.83±1.01a	0.29±0.08ab	50.68±3.07c	94.33±3.51a
	N60	8.33±0.02ab	1 816.67±59.87c	1.00±0.01b	52.31±0.43b	14.99±0.76a	0.27±0.05ab	33.92±2.23d	79.67±5.51bc
	N80	8.28±0.02b	2 112.33±73.19a	0.92±0.03c	55.65±2.46b	15.29±1.46a	0.32±0.03ab	50.58±5.38c	90.00±3.46a
	N100	8.34±0.02ab	1 995.00±53.39b	1.01±0.01b	55.95±3.10b	16.08±0.96a	0.27±0.03ab	67.25±4.81a	80.00±5.29bc
20~40	CK	8.44±0.04bc	1 465.33±16.17e	0.65±0.01e	37.29±0.90c	10.48±0.49b	0.11±0.01d	11.98±1.79c	56.00±4.58c
	N0	8.57±0.10a	1 538.67±5.51de	0.95±0.01a	42.44±0.77a	11.47±0.61ab	0.24±0.03abc	15.24±0.44c	67.00±4.36b
	N20	8.49±0.01abc	1 560.00±39.28d	0.88±0.02c	40.83±1.05ab	11.50±1.46ab	0.33±0.12a	17.92±4.40bc	67.00±3.46b
	N40	8.48±0.06abc	1 705.00±19.97c	0.90±0.01b	38.55±0.66bc	11.51±1.00ab	0.18±0.04bcd	14.28±2.24c	80.00±3.61a
	N60	8.51±0.01ab	1 658.67±67.52c	0.92±0.01b	39.55±2.62bc	11.42±0.96ab	0.28±0.09ab	23.86±3.46ab	67.33±4.04b
	N80	8.40±0.03c	1 837.67±31.39b	0.74±0.02d	43.47±2.84a	11.80±0.16ab	0.19±0.03bcd	23.96±5.91ab	77.67±2.08a
	N100	8.48±0.04abc	1 982.33±88.64a	0.73±0.02d	36.73±0.91c	12.44±0.13a	0.15±0.04cd	30.28±8.50ab	67.33±6.03b

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