Characteristics of Farmland Plastic Film Residue in Typical Agricultural Areas of Henan Province

doi:10.11924/j.issn.1000-6850.casb2025-0131

Abstract

Abstract:

To reduce the white pollution of farmland and promote the sustainable development of agricultural ecology, this study selected 117 farmland sample plots from 9 typical agricultural counties, including east, central, west and north of Henan, to investigate the residual plastic film in farmland, and the effects of key factors such as film mulching years, tillage methods and crop types were analyzed emphatically. The results showed that the residual amount of plastic film in typical agricultural areas of Henan Province ranged from 0 to 11 kg/hm², with an average value of 2.72 kg/hm². The plastic film residual amount under the mechanical film mulching method was 8.8% higher than that of the manual method. With the increase of film mulching years and use time, the residual amount of plastic film in farmland showed an increasing trend. There were significant differences in plastic film residues in plots planted with different crop types, the residual amount of plastic film in garlic field was the highest (3.07 kg/hm²), and the residual amount of plastic film in sandy soil was also higher (3.17 kg/hm²), which was significantly higher than that in fluidic soil, clay and loam. The residual amount of plastic film in large-scale farmland was higher than that in small-scale farmland, and plastic film residue in fields was higher than that in greenhouses. Mulched crops, mulching duration, and mulching methods are the main factors affecting the residual amount of plastic film. In general, the residual amount of plastic film in farmland in typical agricultural areas of Henan Province is at a low level, which is mainly due to the application of thickened high-strength plastic film, fully biodegradable plastic film and residual film mechanical recovery technology in Henan Province. The results of this study provide an empirical basis for Henan Province to formulate a scientific and reasonable farmland plastic film management strategy, and also provide a useful reference for the prevention and control of plastic film pollution in similar agricultural areas in China.

Key words: Henan, agricultural fields, film residue, influencing factors, distribution characteristics, governance measures

XIN Yinping, HU Feng, KONG Defang, HAN Zhongyu, LI Guoqiang. Characteristics of Farmland Plastic Film Residue in Typical Agricultural Areas of Henan Province[J]. Chinese Agricultural Science Bulletin, 2025, 41(24): 51-57.

Figures/Tables 9

References 24

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取样区域	样品量/个	地膜残留量/(kg/hm²)	变异系数/%	最小值/(kg/hm²)	最大值/(kg/hm²)
豫东	60	3.24±1.59	49.07	0.21	6.28
豫中	46	2.19±3.08	140.64	0	11
豫西	7	3.10±1.93	62.26	1.2	6.6
豫北	4	1.25±1.46	116.80	0	2.8
全省	117	2.75±2.35	85.45	0	11

取样区域	样品量/个	地膜残留量/(kg/hm²)	变异系数/%	最小值/(kg/hm²)	最大值/(kg/hm²)
豫东	60	3.24±1.59	49.07	0.21	6.28
豫中	46	2.19±3.08	140.64	0	11
豫西	7	3.10±1.93	62.26	1.2	6.6
豫北	4	1.25±1.46	116.80	0	2.8
全省	117	2.75±2.35	85.45	0	11

覆膜方式	样品量/个	地膜残留量/(kg/hm²)	变异系数/%	最小值/(kg/hm²)	最大值/(kg/hm²)
人工覆膜	72	2.59±2.60	100.39	0	10.5
机械覆膜	45	2.84±2.21	77.82	0	11

覆膜方式	样品量/个	地膜残留量/(kg/hm²)	变异系数/%	最小值/(kg/hm²)	最大值/(kg/hm²)
人工覆膜	72	2.59±2.60	100.39	0	10.5
机械覆膜	45	2.84±2.21	77.82	0	11

覆膜年限/a	样品量/个	地膜残留量/(kg/hm²)	变异系数/%	最小值/(kg/hm²)	最大值/(kg/hm²)
>20	4	4.06±1.48	36.45	2.71	5.62
(10，20]	5	3.73±1.62	43.43	2.06	5.85
(5，10]	33	2.79±1.93	69.18	0	6.28
≤5	75	2.60±2.58	99.23	0	11