| 摘要: |
| 【目的】探讨垄沟宽度对垄膜沟播胡麻水分利用效率和产量的影响，为提高垄膜沟播胡麻经济效益提供依据。【方法】对25 cm垄沟宽垄膜沟播（R25）、35 cm垄沟宽垄膜沟播（R35）、45 cm垄沟宽垄膜沟播（R45）和露地条播（CK）4个栽培条件下胡麻田土壤水分、胡麻生物量、水分利用效率、产量进行了比较分析。【结果】覆膜处理可缩短胡麻生育期2 d，不同处理间出苗率差异较大。胡麻种植区、覆膜区土壤水分垂直变化总体随土层增加呈增加趋势。R25、R35处理的生物量变化趋势一致，先上升后降低，鲜质量和干质量均在灌浆期达到最大值；R45处理和CK的生物量变化趋势一致，鲜质量在开花期最高，干质量在成熟期最高。R25处理的水分利用效率和产量均高于其他处理，R25处理水分利用效率较CK提高了32.81%，产量较CK提高了16.67%。【结论】垄沟宽度是影响垄膜沟播胡麻水分利用效率和产量的重要因素，较小的垄沟宽度（25 cm）有利于提高胡麻水分利用效率和产量。 |
| 关键词: 胡麻； 地膜覆盖； 产量； 水分利用效率； 垄沟宽 |
| DOI：10.13522/j.cnki.ggps.20180659 |
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| Effect of Ridge-furrow Width on Water Use Efficiency and Yield of Flax Planted in Furrow with Ridge Film Mulching |
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YANG Li
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Pingliang Academy of Agricultural Science, Pingliang, Gansu 744000
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| Abstract: |
| 【Objective】 This paper aims to reveal the influence of ridge-furrow width on the yield and water use efficiency (WUE) of flax and provide bases for increasing the economic benefits of this crop.【Method】The soil moisture, flax biomass, WUE and yield of four different flax cultivating patterns, namely furrow planting with ridge film mulching in ridge-furrow width of 25 cm (R25), 35 cm (R35) and 45 cm (R45) and uncovered drilling (CK) were compared.【Result】Flax growth period shortened within 2 days in the plastic mulching treatments and the emergence rate was different among the treatments. The soil moisture gradually increased with the deepening of soil layer in both flax planting area and film-covered area. Biomass of R25, R35 increased at the beginning and then decreased through the whole stage, and reached their maximum at filling stage. The wet weight of R45 and CK reached the maximum at flowering stage, and the maximum of dry weight was at maturity stage. The WUE and yield of R25 was higher than other treatments. The WUE of R25 was 32.81% higher than CK, and the yield respectively increased by 16.67% compared with CK. 【Conclusion】Our results suggest that the width of ridge and furrow could influence the WUE and yield of flax, and the ridge-furrow width in 25 cm is optimal to improve the WUE and yield of flax. |
| Key words: oil flax; plastic film mulching; yield; WUE; ridge-furrow width |
