Effects of No-tillage Straw Mulching on the Stoichiometric Characteristics of Nutrients and Enzyme Activities in Black Soils of Agricultural Fields

doi:10.7668/hbnxb.20195111

Abstract

Abstract:

In order to investigate the effects of conservation tillage techniques on soil nutrient and enzyme activity indicators,as well as ecological stoichiometry characteristics in black soil areas,this study used a 3-year positioning experiment method,with tillage (A-A) as the control,to investigate the changes in total nutrients soil organic carbon(SOC),total nitrogen (TN),total phosphorus(TP) and enzyme activities of β-D-glucosidase(βG),leucine aminopeptidase(LAP),N-1,4-acetylglucosidase(NAG),acid phosphatase(ACP)and their ecological stoichiometry characteristics in black soil under rotary tillage (B-B),conventional no tillage (C-C),and no tillage and straw mulching with original crop (0-0) treatments.The results showed that no tillage with straw mulching significantly increased soil SOC,TN,and TP content compared to tillage;except for C/N,the C/P and N/P ratios of straw mulching in no tillage with straw mulching were higher than those in tillage.The soil SOC and TN content of rotary tillage and conventional no tillage were relatively reduced compared to tillage,while the C/N,C/N,and N:P values all significantly increased in the second year.Compared with tillage,the activities of four enzymes were significantly increased under the no tillage and straw mulching treatment.In the third year,rotary tillage significantly increased ACP and βG by 22.05% and 50.00%,respectively,compared with tillage.Rotary tillage,conventional no tillage,and no tillage with straw mulching all significantly increased soil enzyme C/P.The vector angles of soil enzyme activity under the tested cultivation methods were all less than 45 degrees,indicating that soil microorganisms in the experimental area may be limited by N;the length of enzyme vector increased significantly with age,indicating an increased degree of restriction by C.The results of principal component analysis,grey relational analysis,and correlation analysis showed that no tillage with straw mulching had the most significant impact on soil nutrient content and enzyme activity.In summary,the no tillage and straw mulching with original crop technology measures have a good improvement effect on activating soil nutrients and enzyme activity,as well as maintaining soil ecological stability.

Key words: Agricultural black soil, No-tillage, Straw mulching, Soil nutrients, Soil enzyme activity, Ecological stoichiometric characterization

WANG Ziying, CHE Yanjing, BAI Xueyan, FENG Jingyi, ZHANG Weijian, HE Wanying, GU Siyu. Effects of No-tillage Straw Mulching on the Stoichiometric Characteristics of Nutrients and Enzyme Activities in Black Soils of Agricultural Fields[J]. Acta Agriculturae Boreali-Sinica, 2025, 40(2): 107-116. doi: 10.7668/hbnxb.20195111.

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References 52

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处理 Treatment	2020		2021
处理 Treatment	矢量长度 Vector L	矢量角度/° Vector A	矢量长度 Vector L	矢量角度/° Vector A
A-A	1.24±0.02ab	42.21±0.77a	1.26±0.02c	42.53±1.23a
B-B	1.23±0.00b	42.00±0.31a	1.30±0.01b	42.54±0.32a
C-C	1.27±0.01a	41.97±0.33a	1.19±0.00d	41.70±0.17a
0-0	1.25±0.01ab	41.77±0.22a	1.32±0.01a	41.44±0.11a

处理 Treatment	2020		2021
处理 Treatment	矢量长度 Vector L	矢量角度/° Vector A	矢量长度 Vector L	矢量角度/° Vector A
A-A	1.24±0.02ab	42.21±0.77a	1.26±0.02c	42.53±1.23a
B-B	1.23±0.00b	42.00±0.31a	1.30±0.01b	42.54±0.32a
C-C	1.27±0.01a	41.97±0.33a	1.19±0.00d	41.70±0.17a
0-0	1.25±0.01ab	41.77±0.22a	1.32±0.01a	41.44±0.11a

指标 Indicators	SOC	TN	TP	BG	LAP	NAG	ACP	C/N	C/P	N/P	酶C/N Enzyme C/N	酶C/P Enzyme C/P	酶N/P Enzyme N/P
SOC	1.00
TN	0.91^***	1.00
TP	0.69^*	0.84^***	1.00
BG	-0.17	-0.45	-0.38	1.00
LAP	0.44	0.57	0.25	-0.65^*	1.00
NAG	0.30	0.56	0.48	-0.71^**	0.71^*	1.00
ACP	0.41	0.67^*	0.58^*	-0.93^***	0.68^*	0.80^**	1.00
C/N	0.64^*	0.34	0.13	0.31	-0.08	-0.31	-0.19	1.00
C/P	0.95^***	0.76^**	0.42	-0.01	0.41	0.14	0.23	0.76^**	1.00
N/P	0.86	0.85	0.54	-0.31	0.69	0.49	0.51	0.26	0.82	1.00
酶C/N	-0.23	-0.51	-0.43	0.99^***	-0.66^*	-0.75^**	-0.97^***	0.28	-0.07	-0.37	1.00
Enzyme C/N
酶C/P	-0.18	-0.45	-0.35	0.86^***	-0.77^**	-0.93^***	-0.86^***	0.32	-0.05	-0.36	0.88^***	1.00
Enzyme C/P
酶N/P	0.14	0.27	0.12	-0.28	0.66^*	0.79^**	0.32	-0.24	0.10	0.37	-0.29	-0.69^*	1.00
Enzyme N/P

指标 Indicators	SOC	TN	TP	BG	LAP	NAG	ACP	C/N	C/P	N/P	酶C/N Enzyme C/N	酶C/P Enzyme C/P	酶N/P Enzyme N/P
SOC	1.00
TN	0.91^***	1.00
TP	0.69^*	0.84^***	1.00
BG	-0.17	-0.45	-0.38	1.00
LAP	0.44	0.57	0.25	-0.65^*	1.00
NAG	0.30	0.56	0.48	-0.71^**	0.71^*	1.00
ACP	0.41	0.67^*	0.58^*	-0.93^***	0.68^*	0.80^**	1.00
C/N	0.64^*	0.34	0.13	0.31	-0.08	-0.31	-0.19	1.00
C/P	0.95^***	0.76^**	0.42	-0.01	0.41	0.14	0.23	0.76^**	1.00
N/P	0.86	0.85	0.54	-0.31	0.69	0.49	0.51	0.26	0.82	1.00
酶C/N	-0.23	-0.51	-0.43	0.99^***	-0.66^*	-0.75^**	-0.97^***	0.28	-0.07	-0.37	1.00
Enzyme C/N
酶C/P	-0.18	-0.45	-0.35	0.86^***	-0.77^**	-0.93^***	-0.86^***	0.32	-0.05	-0.36	0.88^***	1.00
Enzyme C/P
酶N/P	0.14	0.27	0.12	-0.28	0.66^*	0.79^**	0.32	-0.24	0.10	0.37	-0.29	-0.69^*	1.00
Enzyme N/P

指标 Indicators	SOC	TN	TP	BG	LAP	NAG	ACP	C/N	C/P	N/P	酶C/N Enzyme C/N	酶C/P Enzyme C/P	酶N/P Enzyme N/P
SOC	1.00
TN	0.67^*	1.00
TP	0.30	0.56	1.00
BG	0.45	0.49	0.81^**	1.00
LAP	-0.58^*	-0.27	-0.36	-0.33	1.00
NAG	0.30	0.40	0.73^**	0.68^*	-0.23	1.00
ACP	0.32	0.30	0.66^*	0.80^**	-0.33	0.80^**	1.00
C/N	0.25	-0.53	-0.37	-0.09	-0.30	-0.21	-0.01	1.00
C/P	0.69^*	0.22	-0.46	-0.17	-0.25	-0.26	-0.19	0.49	1.00
N/P	0.54	0.69^*	-0.20	-0.11	-0.01	-0.12	-0.23	-0.29	0.67^*	1.00
酶C/N	0.47	0.50	0.76^**	0.97^***	-0.30	0.55	0.65^*	-0.08	-0.11	-0.05	1.00
Enzyme C/N
酶C/P	0.39	0.27	0.29	0.53	-0.40	-0.21	0.17	0.11	0.15	0.06	0.60^*	1.00
Enzyme C/P
酶N/P	0.05	0.29	0.46	0.34	0.18	0.84^***	0.42	-0.33	-0.29	-0.05	0.27	-0.57	1.00
Enzyme N/P

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