西北旱区民勤绿洲滴灌马铃薯揭膜效应研究

侯晓燕; 王凤新; 康绍忠; 冯绍元; 韩江江

Effects of uncovering plastic film mulch on drip-irrigated potato in arid Minqin oasis Northwest China

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DOI：10.7606/j.issn.1000-7601.2008.04.18

Key Words: potato drip irrigation plastic mulching soil temperature yield

Author Name	Affiliation
HOU Xiaoyan	Center for Agricultural Water Research in China China Agricultural University，Beijing 100083，China
WANG Fengxin	Center for Agricultural Water Research in China China Agricultural University，Beijing 100083，China
KANG Shaozhong	Center for Agricultural Water Research in China China Agricultural University，Beijing 100083，China
FENG Shaoyuan	Center for Agricultural Water Research in China China Agricultural University，Beijing 100083，China
HAN Jiangjiang	Center for Agricultural Water Research in China China Agricultural University，Beijing 100083，China

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Abstract:

A field experiment was carried out to study the effects of uncovering plastic mulch on drip-irrigated potato in desert oasis located in the downstream of Shiyang River Basin Gansu Province．The experiment comprised five mulching treatments according to the mulching durations：D1（Removing mulch 60days after planting）；D2 D3and D4（Removing mulch at15days’interval thereafter respectively）；D5（mulching during the whole growing season）．A non-mulching control was also included．The results showed that mulching increased daily average soil temperature in the upper soil layers by2～9℃ during the potato’s early growing period．The topsoil temperature kept above30℃ for more than four hours everyday before tuber bulking period which had been proven to be detrimental to potato growth．Both the tuber yield and WUE （Water use efficiency） of treatment D1 were higher than any other treatment and they had a tendency to decline when the mulching duration was longer．All the mulching treatments had higher yield and WUE than the control.