摘要
生物降解地膜可以有效解决白色污染问题,本试验观察生物降解地膜在田间的降解状况及作物的生长,研究了它对玉米生长的影响。结果表明:生物降解地膜从地膜边缘开始降解,由小孔洞逐渐大块裂开,到作物收获时,暴露在地表的地膜全部降解,而埋土部分和根系周围降解缓慢;玉米苗期和拔节期用降解地膜覆盖土壤贮水量可以比裸地增加3倍和1倍,保墒效果较好,抽雄期后土壤贮水量降低到播种期贮水量之下,保墒作用越来越弱;玉米生育前期,生物降解地膜可以提高地温0 . 4 1～0. 9℃,到中后期增温作用不明显;生物降解地膜覆盖使玉米提前10d成熟并增加了产量。
The biodegradable film application can escape from plastic pollution on environment. This experiment studied the effect of biodegradable mulch film on corn growth and its degradation in field. The results showed that the film edge began to be degraded, changing from small holes into big pieces, and finally completely decomposed at crop harvest. The buried pieces in soil and around crop root were also gradually degraded. Soil water-storing capacities at seedling and jointing stages were three and once times higher under mulching condition than that without mulching respectively. However, the effect of conserving water through mulching decreased after silk stage. Soil water-storing capacity fell below the level of the sowing stage. Comparing with non film covering, soil temperature under the film mulching increased by 0.41-0.9℃ at early stage of corn growth, but no difference afterwards. Similar as plastic film mulching, corn with the degradable film mulching had 10 days early of maturation stage and higher yield than that with non mulchina cultivation.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2005年第2期74-78,共5页
Journal of China Agricultural University
基金
农业部农业结构调整重大专项 (2 0 0 2 11 0 3A)
关键词
生物降解地膜
玉米
田间降解
biodegradable mulch film
corn
degradation
