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首页> 外文期刊>Soil & Tillage Research >Effects of tillage and traffic on crop production in dryland farming systems: II. Long-term simulation of crop production using the PERFECT model
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Effects of tillage and traffic on crop production in dryland farming systems: II. Long-term simulation of crop production using the PERFECT model

机译：耕作和交通运输对旱地耕作系统中农作物的影响：II。使用PERFECT模型进行作物生产的长期模拟

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Soil water conservation is critical to long-term crop production in dryland cropping areas in Northeast Australia. Many field studies have shown the benefits of controlled traffic and zero tillage in terms of runoff and soil erosion reduction, soil moisture retention and crop yield improvement. However, there is lack of understanding of the long-term effect of the combination of controlled traffic and zero tillage practices, as compared with other tillage and traffic management practices. In this study, a modeling approach was used to estimate the long-term effect of tillage, traffic, crop rotation and type, and soil management practices in a heavy clay soil. The PERFECT soil-crop simulation model was calibrated with data from a 5-year field experiment in Northeast Australia in terms of runoff, available soil water and crop yield; the procedure and outcomes of this calibration were given in a previous contribution. Three cropping systems with different tillage and traffic treatments were simulated with the model over a 44-year-period using archived weather data. Results showed higher runoff, and lower soil moisture and crop production with conventional tillage and accompanying field traffic than with controlled traffic and zero tillage. The effect of traffic is greater than the effect of tillage over the long-term. The best traffic, tillage and crop management system was controlled traffic zero tillage in a high crop intensity rotation, and the worst was conventional traffic and stubble mulch with continuous wheat. Increased water infiltration and reduced runoff under controlled traffic resulted in more available soil water and higher crop yield under opportunity cropping systems.
机译：在澳大利亚东北部干旱地区，土壤水养护对于长期作物生产至关重要。许多田间研究表明，控制流量和零耕作在径流和土壤侵蚀减少，土壤水分保持和作物产量提高方面具有好处。但是，与其他耕种和交通管理实践相比，缺乏对受控交通和零耕作实践相结合的长期影响的了解。在这项研究中，使用一种建模方法来估算重黏土中耕作，交通，作物轮作和类型以及土壤管理实践的长期影响。 PERFECT土壤作物模拟模型是根据澳大利亚东北部一项为期5年的田间试验的数据进行校准的，该数据来自径流，可用土壤水和作物产量。该校准的过程和结果在先前的贡献中给出。该模型使用存档的天气数据，在44年的时间里使用该模型模拟了具有不同耕作和交通处理方式的三种耕作系统。结果表明，与常规耕种和伴随耕作相比，常规耕作和伴随耕作的耕作比对照耕种和零耕作的耕地具有更高的径流量，并且土壤水分和作物产量更低。从长期来看，交通的影响大于耕作的影响。最佳的交通，耕作和农作物管理系统是在高强度耕作条件下控制交通零耕作，而最差的是常规交通和连续麦茬覆盖。在受控交通条件下增加的水渗透和减少的径流导致机会耕作制度下更多的土壤水和更高的作物产量。

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