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| DOI：10.13522/j.cnki.ggps.2017.0333 |
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| Application Effect of Three Kinds of Plastic Film Mulching in Corn Field of Whole-mulching Plastic Films on Double Ridges |
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YUE Decheng, LI Qingmei, HAN Juhong, LIU Jianwei,SHI Guangliang, JIANG Yanjun, HU Guanfang, JIA Chunhong
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Institute of Pingliang Agricultural Sciences, Pingliang 744000, China; Institute of Plant Protection, Gansu Academy of Agricultural Sciences, Lanzhou 730070, China； Institute of Plant Protection and Environment Protection, Beijing Academy of Agricultural and Forestry Science, Beijing 100097, China
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| Abstract: |
| 【Objective】 This study aims to determine the best film mulching time of chemical weeding mulching, black plastic film and white plastic film in the corn field of whole-mulching plastic films on double ridges. 【Method】 Based on the field experiments, the effects of three kinds of plastic film on controlling weeds, yield and income were studied. 【Result】 The results showed that the chemical weeding mulching film and black plastic film had an ideal control effect on field weeds in different mulching time. The stem control effect and fresh and heavy effect of broad leaf weeds exceeded more than 85% and 95%, and over topped more than 60% and 75% on Gramineous weeds. Moreover, the chemical weeding mulching and black plastic film had more obvious effects on maize plant height, plant height evenness, yield traits, yield and economic benefits, but it had no effects on maize emergence rate, chlorophyll contentetc. And it also showed that ahead of the mulching time was helpful to improve the agronomic characters, yield and economic benefits of maize. The chemical weeding mulching film and black plastic film mulched in autumn last year increased the yield by 4.19% and 9.85% than that mulched in the sowing date, and the income increased by 839.51 and 1 855.31 yuan/hm2. The controlling effect of the white plastic film on field weeds was significantly lower than chemical weeding mulching and black plastic film in different mulching period, but if postponing the mulching time till sowing, the fresh and heavy effect were 90.21% and 74.70% of Broadleaf weeds and Gramineous weeds. In addition, the white plastic film had some effects on chlorophyll content of maize, the effect was stronger by mulching in the maize seeding stage, followed by the sowing date, but it made no difference in the rapid growth period. And emergence rate and ear roughness were not affected by white plastic film. The plant height, plant height evenness, double spike rate, ear effective length, grain number per spike, 100-seed weight, yield and economic benefits significantly decreased with the early stage of film mulching. The yield and income was reduced by 19.09% and 3 861.73 RMB/hm2, respectively, when mulch in autumnlast year than sowing date. 【Conclusion】 It is suggested that in the case of severe or heavy occurrence of weeds in Longdong arid area, chemical weeding mulching and black plastic mulches in autumn last year have best effects. The white film mulch should be arranged as late as possible when the soil moisture is better corn sowing film. |
| Key words: corn field of whole-mulching plastic films on double ridges; plastic film species; film mulching period; weed control effect; cornyield |
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