Wang An, Chang Qingtao, Chen Chunsheng, Zhong Xiaoquan, Yuan Kexiang, Yang Meihua, Wu Wei
Special Grain Classics Laboratory, Taizhou Institute of Agricultural Science, Jiangsu Academy of Agricultural Sciences, 56 Autumn Snow Lake Avenue, Taizhou, 225300, China.
Department of Vegetable, Xinghua Modern Agriculture Development Service Center, Taizhou, 225700, China.
AMB Express. 2022 Jun 22;12(1):81. doi: 10.1186/s13568-022-01420-y.
This study investigated the degradation characteristics of different biodegradable film and its effects on soil nutrients in tillage layer, growth and development of taro and yield formation. Field experiment with biodegradable films, including poly-(butylene adipate-co-butylene terephthalate) PBAT, (poly-carbon dioxide) PCO2, (poly propylene carbonate) PPC, as well as common mulch film (CK1) and uncovered mulch film (CK2) were conducted on Longxiang taro in 2020 and 2021 respectively. The degradation rate of the three biodegradable films was PBAT > PPC > PCO2. Compared with CK1, the alkali-hydrolyzed N of PBAT at the growth stage and fruiting stage significantly increased in 2020 and 2021, respectively (both, P < 0.05). The average content of available P of PPC at seedling stage was higher than that in PCO2, and CK1 was significantly decreased compared with that in CK2 (all, P < 0.05). The content of soil available K and organic matter in different growth stages of taro in all film mulching treatments were decreased in comparison to CK2. Moreover, compared with CK2, PCO2 biodegradable film significantly increased plant height at seedling and growth stage, stem diameter at growth stage, and leaf area index at fruiting stage (all, P < 0.05). Similarly, the yield of mother and filial bulbs of PPC, PCO2 and PBAT were significantly higher than those of CK2 in 2020 and 2021, respectively (all, P < 0.05). However, no significant differences were found in starch, polysaccharide and protein contents among different treatments. The three biodegradable films, especially PCO2, can significantly affect soil nutrient content, promote plant growth and improve taro yield.
本研究探讨了不同生物可降解地膜的降解特性及其对耕层土壤养分、芋头生长发育和产量形成的影响。分别于2020年和2021年对龙香芋进行了生物可降解地膜田间试验，包括聚己二酸丁二醇酯-对苯二甲酸丁二醇酯（PBAT）、聚二氧化碳（PCO2）、聚碳酸亚丙酯（PPC），以及普通地膜（CK1）和无覆盖地膜（CK2）。三种生物可降解地膜的降解速率为PBAT＞PPC＞PCO2。与CK1相比，2020年和2021年PBAT在生长阶段和结果阶段的碱解氮含量分别显著增加（均P＜0.05）。PPC在苗期的有效磷平均含量高于PCO2，且与CK2相比，CK1显著降低（均P＜0.05）。与CK2相比，所有地膜覆盖处理下芋头不同生长阶段的土壤速效钾和有机质含量均降低。此外，与CK2相比，PCO2生物可降解地膜显著增加了苗期和生长阶段的株高、生长阶段的茎粗以及结果阶段的叶面积指数（均P＜0.05）。同样，2020年和2021年PPC、PCO2和PBAT的母芋和子芋产量分别显著高于CK2（均P＜0.05）。然而，不同处理间淀粉、多糖和蛋白质含量未发现显著差异。三种生物可降解地膜，尤其是PCO2，能显著影响土壤养分含量，促进植株生长并提高芋头产量。
