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首页> 外文期刊>Industrial Crops and Products >Continuous ridges with film mulching improve soil water content, root growth, seed yield and water use efficiency of winter oilseed rape
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Continuous ridges with film mulching improve soil water content, root growth, seed yield and water use efficiency of winter oilseed rape

机译：连续地膜覆盖垄可改善冬季油菜的土壤水分，根系生长，种子产量和水分利用效率

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摘要

Limited water resources and low water use efficiency (WUE) have limited the increase in yield of winter oilseed rape (Brassica napus L) in northwestern China for a long time. In order to determine an optimal cultivation method for increasing seed yield and improving WUE, field experiments were conducted to study the effects of various ridge-furrow and film-mulching planting patterns on soil water content, root distribution, seed yield, and WUE for three growing seasons from 2012 to 2015. Winter oilseed rape was planted in four patterns: flat planting without film mulching (CK), flat planting with film mulching (M1), ridge-furrow planting with film mulching on both ridges and furrows (M2), and ridge-furrow planting with film mulching on continuous ridges (M3). The results showed that M3 was the best at increasing soil water storage to a depth of 1.0 m after rain or irrigation and at maintaining much higher soil water content in the 0-0.3 m soil layer at the late growth stage. M3 produced the shortest taproots, but the largest taproot diameter and dry weight at both the seedling and pod-filling stages in all the three growing seasons. M3 also induced significantly more lateral-root proliferation in the 0-0.1 and 0.1-0.2 m soil layers without much reduction of lateral-root mass density in the 0.2-0.3 m layer in comparison to M1 and M2. Seed yield and WUE were the highest and evapotranspiration (ET) was the lowest in M3 in all the three growing seasons. Average seed yield was 70.0, 41.1, and 15.0% higher and average ET was 23.6, 14.3, and 9.4% lower in M3 than in CK, M1, and M2, respectively, thus improving WUE by 121.9, 64.5, and 26.8%, respectively. These results suggested that M3 was the best mulching and planting treatment for improving soil water storage, root growth, seed yield, and WUE. M3 may thus be the optimal mulching and planting pattern for the cultivation of winter oilseed rape in arid and semiarid areas. (C) 2016 Elsevier B.V. All rights reserved.
机译：长期以来，有限的水资源和低水利用效率（WUE）限制了冬季油菜（Brassica napus L）的增产。为了确定提高种子产量和改善水分利用效率的最佳栽培方法，进行了田间试验，研究了三种垄沟和地膜覆盖种植方式对三种土壤水分，根系分布，种子产量和水分利用效率的影响。从2012年到2015年的生长季节。冬季油菜以四种模式种植：不覆膜的平地种植（CK），不覆膜的平地种植（M1），对垄和犁地都进行覆膜的垄沟种植（M2），和垄沟种植，在连续的垄上覆盖地膜（M3）。结果表明，M3最适合于雨后或灌溉后将土壤水分增加至1.0 m的深度，并在生育后期保持0-0.3 m土层中更高的土壤水分含量。在所有三个生长季节中，M3产生的主根最短，但主根直径和干重最大。与M1和M2相比，M3在0-0.1和0.1-0.2 m土层中还诱导了更多的侧根增殖，而在0.2-0.3 m土层中没有显着降低侧根质量密度。在所有三个生长季节中，M3的种子产量和WUE最高，而蒸散量（ET）最低。 M3的平均种子产量分别比CK，M1和M2高70.0、41.1和15.0％，平均ET低23.6、14.3和9.4％，因此WUE分别提高了121.9、64.5和26.8％。 。这些结果表明，M3是改善土壤水分存储，根系生长，种子产量和WUE的最佳覆盖和种植处理。因此，M3可能是在干旱和半干旱地区种植冬季油菜的最佳覆盖和种植方式。 （C）2016 Elsevier B.V.保留所有权利。

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