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作者	单位
白有帅，贾生海，黄彩霞，雒天峰	（1.甘肃农业大学工学院，甘肃兰州 730070； 2.甘肃省水利科学研究院，甘肃兰州 730000）

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中文摘要:

为探索旱作区生物降解膜对春小麦的影响，在甘肃兰州对春小麦进行了生物降解膜、普通地膜和露地栽培条件下，土壤温度、水分和小麦产量的检测和分析。结果表明，生物降解膜和普通地膜处理下，春小麦全生育期0~25 cm土层土壤温度比露地高0.78 ℃和1.84 ℃；在小麦苗期-抽穗期，两种覆膜处理对地温的影响无显著差异，小麦抽穗之后，生物降解膜对土壤的增温效果显著低于普通地膜；小麦抽穗之前，两种覆膜处理下土壤日温度变化趋势差异不明显，抽穗期及后期生物降解膜处理日温度变化趋势与露地无差异。0~200 cm土壤含水量在小麦苗期-抽穗期，两个覆膜处理间差异不显著，均显著高于露地处理；在开花期-灌浆期，生物降解膜处理显著高于露地、低于普通膜处理；在成熟期，生物降解膜处理较普通地膜处理无显著差异，显著高于露地。两种覆膜处理小麦的产量无显著差异，均显著高于露地处理，分别较露地增加 24.03%和32.72%。综上所述，在旱区春小麦栽培中，以生物降解膜代替普通地膜是可行的。

英文摘要:

In order to explore the influences of biodegradable film on spring wheat,detection and analysis of soil temperature,moisture and yield were taken under conditions of biodegradable film,common film and open field at Lanzhou of Gansu.The results showed that 0-25 cm average soil temperature of the biodegradable film covering and treatment with common film increased by 0.78 and 1.84 ℃ respectively,compared with non-mulching.Two covering materials had no difference from seedling to heading stage,and biodegradable film has lower effect on temperature increasing than that of common film after heading stage because of degradation.The covering treatments had no significance before the heading stage,and the biodegradable film had the same effect with open field after the jointing stage.No significant differences were detected between biodegradable film and common film on 0-200 cm average soil water content from seedling to filling stage,which was higher than that of common film.The capability of keeping soil moisture of biodegradable film was significantly higher than that of open field,but was lower than that of common film from flowering to filling stage.No significance was found between biodegradable film and common film,but both were higher than that of open field at maturity stage.Compared to open field,the yield under biodegradable film and common film treatments respectively increased by 24.03% and 32.72%,which was significantly different from CK,but there was no significant difference between two mulched treatments.It was suggested that the biodegradable film could replace common film for spring wheat production at dryland of northwest.

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