| Ecological effects of early plastic mulching and ridging and its effect on seedling stage of cotton in coastal saline soil |
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| DOI：10.7606/j.issn.1000-7601.2018.04.11 |
| Key Words: coastal saline soil early plastic mulching ridge topsoil ecological effects cotton seedling emergence rate establishment rate |
| Author Name | Affiliation | | ZHANG Qian | Cotton Research Institute, Hebei Academy of Agriculture an Forestry Science, Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Ministry of Agriculture, P.R.China, Shijiazhuang， Hebei 050051,China | | FENG Guo-yi | Cotton Research Institute, Hebei Academy of Agriculture an Forestry Science, Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Ministry of Agriculture, P.R.China, Shijiazhuang， Hebei 050051,China | | LEI Xiao-peng | Cotton Research Institute, Hebei Academy of Agriculture an Forestry Science, Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Ministry of Agriculture, P.R.China, Shijiazhuang， Hebei 050051,China | | QI Hong | Cotton Research Institute, Hebei Academy of Agriculture an Forestry Science, Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Ministry of Agriculture, P.R.China, Shijiazhuang， Hebei 050051,China | | WANG Shu-lin | Cotton Research Institute, Hebei Academy of Agriculture an Forestry Science, Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Ministry of Agriculture, P.R.China, Shijiazhuang， Hebei 050051,China | | WANG Yan | Cotton Research Institute, Hebei Academy of Agriculture an Forestry Science, Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Ministry of Agriculture, P.R.China, Shijiazhuang， Hebei 050051,China | | LIANG Qing-long | Cotton Research Institute, Hebei Academy of Agriculture an Forestry Science, Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Ministry of Agriculture, P.R.China, Shijiazhuang， Hebei 050051,China | | LIN Yong-zeng | Cotton Research Institute, Hebei Academy of Agriculture an Forestry Science, Key Laboratory of Biology and Genetic Improvement of Cotton in Huanghuaihai Semiarid Area, Ministry of Agriculture, P.R.China, Shijiazhuang， Hebei 050051,China |
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| Abstract: |
| In order to improve the seedling emergence rate and seedling rate of rain-fed cotton in coastal saline soil, traditional plastic film mulching after seeding was used as the control, an experiment was carried out to investigate the effects of early plastic mulching and different ridging patterns with early plastic mulching on thermohaline in arable layer and seedling stage cotton. The results showed that early plastic mulching could reduce soil salinity in arable layer by 6.99% and 7.55% in the lightly and moderately salty fields respectively. The different ridging patterns with early plastic mulching could reduce soil salinity more quickly, middle and high ridge with early plastic mulching reduced soil salinity by 2.3% and 17.62% respectively, and bilateral and low ridge with early plastic mulching reduced soil salinity by 9.11% and 30.72% respectively. Early plastic mulching could increase the soil moisture and temperature, soil moisture in 20 cm soil depths of middle and high ridge with early plastic mulching, middle and high ridge with early plastic mulching and early plastic mulching without ridging were 19.92%、20.42% and 19.94%，respectively; temperature of 0、5、10 cm and 15 cm layer under the mulch were 3.7℃, 3.6℃, 3.1℃ and 2.8℃ higher than outside at a daily average basis. Temperature of 5 cm、10 cm and 15 cm layer under the mulch were 1.3℃, 1.2℃ and 0.7℃ higher of bilateral and low ridge patterns with early plastic mulching than middle and high ridge, respectively, which promote the seedling emergence. With early plastic mulching significantly increased seedling emergence rate compared with the control, and seedling rate of bilateral and low ridge was the highest, being 34.8% higher than the control. Bilateral and low ridge patterns with early plastic mulching increased seedling emergence rate, seedling rate, single plant biomass by 45.9%, 70.7% and 44.4% in the moderately salty fields, respectively. Bilateral and low ridge patterns with early plastic mulching had the better effect on seedling emergence and protection. |
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