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首页> 外文期刊>Soil & Tillage Research >Buried straw layer plus plastic mulching reduces soil salinity and increases sunflower yield in saline soils
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Buried straw layer plus plastic mulching reduces soil salinity and increases sunflower yield in saline soils

机译：秸秆埋藏层和塑料覆盖层可降低土壤盐分并增加盐渍土壤的向日葵产量

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Soil salinization is a major limitation to high crop yield in saline soils of the Hetao Irrigation District of Inner Mongolia, China. As such, people are forced to use better and more effective approaches to soil management due to scarcity of freshwater and the adverse effects of climate. A three-year field experiment was conducted to investigate the effects of buried straw layer and plastic film mulch on soil moisture, soil salinity and sunflower (Helianthus annuus L.) yield in saline soils. Four field management practices were designed: bare ground (BG), plastic mulch (PM), buried maize straw layer (12 t ha(-1)) at a depth of 40 cm (SL), and combined application of plastic mulch and straw layer burial (PM + SL). Soil water at the 0-40 cm layer was higher under SL and PM + SL than under BG and PM within 45 days after sowing (DAS) but the reverse occurred thereafter. Compared to PM and BG, both SL and PM + SL significantly decreased the salt content of the upper 40 cm depth at sowing. Furthermore, PM + SL invariably decreased the salt content throughout the growth period of sunflower. In contrast, SL and PM moderately increased the salt content during the later growth period. Compared with BG, SL significantly decreased salt accumulation in the off season. Over the three years, the highest seed and biomass yield, 100-seed weight and head diameters of sunflower were obtained from the PM + SL plots. The average seed yield (3198 kg ha I) under PM + SL exceeded the yields under BG, PM and SL by 51.9, 5.9 and 35.7% respectively. Therefore, PM + SL may be an efficient practice for reducing soil salinity and increasing sunflower yield in the Hetao Irrigation District and other similar ecological areas. (C) 2015 Elsevier B.V. All rights reserved.
机译：在中国内蒙古河套灌区的盐渍土壤中，盐碱化是作物高产的主要限制因素。因此，由于淡水短缺和气候的不利影响，人们被迫使用更好，更有效的土壤管理方法。进行了为期三年的田间试验，研究了盐渍土壤中秸秆埋地和地膜覆盖对土壤水分，盐分和向日葵产量的影响。设计了四种田间管理措施：裸露地（BG），塑料覆盖物（PM），深度40 cm（SL）的玉米秸秆埋层（12 t ha（-1）），以及塑料覆盖物和稻草的联合施用层埋葬（PM + SL）。播种（DAS）后45天内，SL和PM + SL下0-40 cm层的土壤水分高于BG和PM下的土壤水分，但此后出现了相反的变化。与PM和BG相比，SL和PM + SL均显着降低了播种时上部40 cm深度的含盐量。此外，PM + SL在向日葵整个生长期始终都会降低盐分含量。相反，SL和PM在后期生长期适度增加了盐含量。与BG相比，SL在淡季显着减少了盐分的积累。在过去的三年中，从PM + SL样地获得了最高的种子和生物量产量，100粒重的向日葵头直径。 PM + SL条件下的平均种子产量（3198 kg公顷I）比BG，PM和SL条件下的平均产量分别高51.9％，5.9％和35.7％。因此，在河套灌区和其他类似的生态区，PM + SL可能是降低土壤盐分和增加向日葵产量的有效方法。 （C）2015 Elsevier B.V.保留所有权利。

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