Effects of straw mulching and green manure planting on nitrogen and phosphorus runoff loss in hilly tea garden

doi:10.3969/j.issn.1004-1524.2023.04.17

Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (4): 903-912.DOI: 10.3969/j.issn.1004-1524.2023.04.17

• Environmental Science • Previous Articles Next Articles

Effects of straw mulching and green manure planting on nitrogen and phosphorus runoff loss in hilly tea garden

YU Qiaogang¹(), JIANG Mingbei², SUN Wanchun¹, HUANG Zhengchen¹^,³, WANG Feng¹, WANG Qiang¹, MA Junwei¹^,^*()

1. Institute of Environment Resource and Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
2. Agriculture and Rural Development Service Center of Chun’an County, Chun’an 311700, Zhejiang, China
3. College of Environment and Resources, Zhejiang A&F University, Hangzhou 311300, China

Received:2022-06-01 Online:2023-04-25 Published:2023-05-05

Abstract

Abstract:

In the present study, the characteristics of nitrogen and phosphorus nutrient loss in hilly tea gardens in southern China, which was represented by Qiandaohu Reservoir area, and the effects of green manure (Vulpia myuros) planting and straw mulching on soil nitrogen and phosphorus runoff loss were studied by natural rainfall and runoff monitoring experiment. The results showed that the water runoff mainly occurred from January to September, and the water runoff was relatively larger from March to July. The highest nitrogen and phosphorus losses were recorded in June. Compared with the convensional mode, straw mulching and green manure planting significantly (P<0.05) reduced the amount of runoff water by 51.4% and 62.0%, respectively, and soil sediment loss by 63.6% and 75.8%, respectively. Nitrate nitrogen was the main form of inorganic nitrogen loss, and total nitrogen loss was higher than total phosphorus loss in the tea garden runoff. Compared with the conventional mode, straw mulching and green manure planting significantly (P<0.05) reduced the amount of ammonium nitrogen loss in runoff water by 68.6% and 79.4%, respectively, nitrate nitrogen loss by 66.2% and 75.8%, respectively, total nitrogen loss by 63.4% and 75.9%, respectively, total phosphorus loss by 60.7% and 72.2%, respectively.Besidess, straw mulching and green manure planting could enhance soil fertility and increase tea yield, thus is suitable for the ecological environment protection of tea garden in the hilly areas of southern China.

Key words: nitrogen and phosphorus loss, runoff, hilly tea garden, straw mulching, Vulpia myuros

CLC Number:

S157.2

YU Qiaogang, JIANG Mingbei, SUN Wanchun, HUANG Zhengchen, WANG Feng, WANG Qiang, MA Junwei. Effects of straw mulching and green manure planting on nitrogen and phosphorus runoff loss in hilly tea garden[J]. Acta Agriculturae Zhejiangensis, 2023, 35(4): 903-912.

Figures/Tables 12

References 26

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处理 Treatment	径流水量 Runoff water/ (m³·hm^-2)	泥沙流失量 Sediment loss/ (kg·hm^-2)
CK	764.5 a	36.5 a
JG	371.8 b	13.3 b
LF	290.7 c	8.8 c

处理 Treatment	径流水量 Runoff water/ (m³·hm^-2)	泥沙流失量 Sediment loss/ (kg·hm^-2)
CK	764.5 a	36.5 a
JG	371.8 b	13.3 b
LF	290.7 c	8.8 c

处理 Treatment	各月的铵态氮径流流失量Runoff loss of ammonium nitrogen in different month
处理 Treatment	1	2	3	4	5	6	7	8	9
CK	0.013 a	0.011 a	0.204 a	0.122 a	0.039 a	0.438 a	0.099 a	0.075 a	0.016 a
JG	0.003 b	0.003 b	0.053 b	0.039 b	0.012 b	0.117 b	0.035 b	0.046 ab	0.011 a
LF	0.004 b	0.004 b	0.032 c	0.024 c	0.008 c	0.071 b	0.022 b	0.036 b	0.009 a

处理 Treatment	各月的铵态氮径流流失量Runoff loss of ammonium nitrogen in different month
处理 Treatment	1	2	3	4	5	6	7	8	9
CK	0.013 a	0.011 a	0.204 a	0.122 a	0.039 a	0.438 a	0.099 a	0.075 a	0.016 a
JG	0.003 b	0.003 b	0.053 b	0.039 b	0.012 b	0.117 b	0.035 b	0.046 ab	0.011 a
LF	0.004 b	0.004 b	0.032 c	0.024 c	0.008 c	0.071 b	0.022 b	0.036 b	0.009 a

处理 Treatment	各月的硝态氮径流流失量Runoff loss of nitrate nitrogen in different month
处理 Treatment	1	2	3	4	5	6	7	8	9
CK	0.253 a	0.219 a	0.343 a	0.850 a	0.235 a	1.862 a	0.220 a	0.100 a	0.079 a
JG	0.078 b	0.100 b	0.116 b	0.271 b	0.089 b	0.562 b	0.061 b	0.065 b	0.064 ab
LF	0.098 b	0.050 c	0.084 c	0.185 c	0.057 c	0.396 c	0.035 b	0.051 b	0.048 b

Effects of straw mulching and green manure planting on nitrogen and phosphorus runoff loss in hilly tea garden

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Figures/Tables 12

References 26

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处理 Treatment	各月的总氮径流流失量Runoff loss of total nitrogen in different month
处理 Treatment	1	2	3	4	5	6	7	8	9
CK	0.409 a	0.295 a	0.470 a	1.198 a	0.574 a	2.841 a	0.337 a	0.207 a	0.107 a
JG	0.083 b	0.122 b	0.184 b	0.397 b	0.176 b	1.067 b	0.116 b	0.132 ab	0.082 ab
LF	0.119 b	0.086 b	0.124 c	0.216 c	0.096 b	0.641 c	0.087 c	0.105 b	0.074 b

处理 Treatment	各月的总磷径流流失量Runoff loss of total phosphorus in different month
处理 Treatment	1	2	3	4	5	6	7	8	9
CK	0.024 a	0.017 a	0.023 a	0.105 a	0.072 a	0.139 a	0.030 a	0.031 a	0.013 a
JG	0.009 b	0.004 b	0.007 b	0.040 b	0.030 b	0.058 b	0.012 b	0.012 b	0.006 b
LF	0.013 b	0.002 b	0.004 b	0.024 c	0.020 c	0.042 c	0.010 b	0.007 b	0.005 b

处理 Treatment	全氮 Total N/ (g·kg^-1)	碱解氮 Alkaline hydrolysis N/(mg·kg^-1)	有效磷 Available P/ (mg·kg^-1)	速效钾 Available K/ (mg·kg^-1)	有机质 Organic matter/ (g·kg^-1)	产量(鲜重) Yield (fresh weight)/ (kg·hm^-2)
CK	2.47 b	184 b	262 b	249 c	53.7 b	971.7 b
JG	2.83 a	200 ab	290 a	296 a	59.3 a	1 034.6 a
LF	2.91 a	208 a	297 a	273 b	58.1 a	1 018.4 a

指标Index	AN	NN	TN	TP
径流水量	0.857^**	0.861^**	0.894^**	0.899^**
Water runoff
AN		0.832^**	0.878^**	0.707^**
NN			0.984^**	0.898^**
TN				0.891^**

指标Index	SAN	SAP	SAK	SOM	WR	SL	TN	TP
STN	0.987	0.999^*	0.776	0.931^*	-1.000^**	-1.000^*	-1.000^*	-1.000^*
SAN		0.993	0.664	0.859	-0.985^*	-0.983^*	-0.984^*	-0.983^*
SAP			0.750	0.915	-0.999^*	-0.999^*	-0.998^*	-0.998^*
SAK				0.953^*	-0.783	-0.789	-0.786	-0.790
SOM					-0.934	-0.937	-0.936	-0.938
WR						1.000^**	1.000^**	1.000^**
SL							1.000^**	1.000^**
TN								1.000^**

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