Degradation Characteristics of Different Types of Plastic Film and Their Effects on Cherry Tomato Yield and Soil Environment

doi:10.11924/j.issn.1000-6850.casb2025-0689

Abstract

Abstract:

Suitable types of biodegradable film were screened for cherry tomato growth and soil environmental friendliness. This study employed a non-mulching treatment as a control to investigate the degradation characteristics of national standard polyethylene film, thickened film, and two types of fully biodegradable films, as well as their effects on cherry tomato yield and soil environment. The results showed that: (1) the national standard film and the two fully biodegradable films entered the induction period at 70, 51 and 64 days after sowing, respectively, while the thickened film exhibited no significant changes; among them, the degradation film decomposed at the fastest rate and also achieved the highest degradation level. (2) Film mulching primarily influenced the temperature and moisture of the surface soil at 0-10 cm depth. Throughout the growth period, the four film treatments, national standard film, thickened film, degradation film A, and degradation film B, increased the average soil temperature by 1.18, 1.52, 0.78 and 1.14℃, respectively, and raised the average soil moisture by 1.75%, 2.19%, 3.06%, and 2.61% compared to the non-mulched control. (3) Film mulching promoted the early growth of cherry tomatoes and increased early yield, with degradation film B showing a particularly notable yield improvement by the second harvest. This indicated that mulching could facilitate earlier harvesting of cherry tomatoes and potentially lead to improved economic returns. In summary, fully biodegradable film exhibits a suitable degradation cycle in cherry tomato production, and its effect on maintaining soil temperature and humidity and ensuring crop yield was not significantly different from that of ordinary film. Therefore, fully biodegradable film could serve as an effective substitute for ordinary film in cherry tomato production.

Key words: mulch film, fully biodegradable film, cherry tomato, degradation characteristics, soil hydrothermal conditions, yield

SONG Zhanhua, HUANG Jie, ZHANG Shiguan, WEI Ailin, ZHONG Yong, LIANG Zhongming, LI Lianhua, NONG Yuan, SONG Yi, GAN Guiyun, HE Bingzhu. Degradation Characteristics of Different Types of Plastic Film and Their Effects on Cherry Tomato Yield and Soil Environment[J]. Chinese Agricultural Science Bulletin, 2026, 42(6): 95-101.

Figures/Tables 5

References 25

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序号	降解期	判断标准
1	诱导期	从覆膜到垄面地膜出现多处≤2 cm自然裂缝或孔洞（直径）的时间
2	开裂期	垄面地膜出现≥2 cm、<20 cm自然裂缝或孔洞（直径）的时间
3	大裂期	垄面地膜出大于20 cm自然裂缝或孔洞（直径）的时间

序号	降解期	判断标准
1	诱导期	从覆膜到垄面地膜出现多处≤2 cm自然裂缝或孔洞（直径）的时间
2	开裂期	垄面地膜出现≥2 cm、<20 cm自然裂缝或孔洞（直径）的时间
3	大裂期	垄面地膜出大于20 cm自然裂缝或孔洞（直径）的时间

处理	诱导期		开裂期		大裂期
处理	日期(月/日)	天数/d	日期(月/日)	天数/d	日期(月/日)	天数/d
国标膜	1/14	70	4/1	147	—	—
加厚膜	—	—	—	—	—	—
降解膜A	12/26	51	1/14	70	3/12	127
降解膜B	1/8	64	2/13	100	4/1	147

处理	诱导期		开裂期		大裂期
处理	日期(月/日)	天数/d	日期(月/日)	天数/d	日期(月/日)	天数/d
国标膜	1/14	70	4/1	147	—	—
加厚膜	—	—	—	—	—	—
降解膜A	12/26	51	1/14	70	3/12	127
降解膜B	1/8	64	2/13	100	4/1	147

覆膜天数/d	处理	土壤含水量/%
覆膜天数/d	处理	0~10 cm	10~20 cm	20~30 cm
10	CK	51.67±4.04 b	72.00±2.65 a	73.33±2.08 a
	国标膜	47.00±4.36 b	72.00±1.73 a	72.67±2.08 a
	加厚膜	51.67±3.51 b	72.00±1.73 a	74.00±1.00 a
	降解膜A	63.00±2.00 a	71.00±3.46 a	74.33±1.15 a
	降解膜B	49.00±3.54 b	73.33±1.41 a	73.00±2.12 a
30	CK	39.00±1.73 b	54.00±2.65 b	67.33±1.53 b
	国标膜	42.00±4.36 ab	63.33±1.53 a	70.67±1.53 a
	加厚膜	45.33±2.52 a	64.33±1.53 a	72.00±1.00 a
	降解膜A	41.67±3.79 ab	62.00±1.00 a	72.00±1.00 a
	降解膜B	43.33±2.12 ab	64.33±0.71 a	70.33±0.71 a
50	CK	53.67±1.53 a	73.00±1.00 a	73.67±1.53 a
	国标膜	54.33±1.53 a	72.00±3.00 a	74.67±3.51 a
	加厚膜	49.00±1.73 a	74.00±5.29 a	74.67±1.15 a
	降解膜A	53.33±3.79 a	72.00±4.36 a	74.00±1.73 a
	降解膜B	52.00±5.66 a	75.00±1.41 a	74.33±0.04 a
70	CK	33.67±1.53 c	53.67±1.53 b	69.33±2.08 a
	国标膜	38.67±2.89 ab	59.33±3.06 a	68.67±0.58 a
	加厚膜	34.33±2.52 bc	60.00±1.00 a	69.33±2.31 a
	降解膜A	38.67±3.21 ab	60.67±2.52 a	68.33±1.15 a
	降解膜B	40.67±0.71 a	60.33±2.12 a	70.00±2.83 a