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一、为什么要发展联合作业 国内外的实践证明,耕作机械的联合具有以下优点: 1.把几项作业一次完成,缩短了工序间隔和作业周期,有利于提高作业质量和产量。在许多情况下采用联合作业不仅是可能的,而且是必要的。例如耕整地联合作业有利于保墒,深松施肥有利于保持肥效减少肥效损失。在三夏”和“三秋”农时比较紧张的季节,缩短作业周期,可减少不利气候的影响。特别是在我国华北、西北干旱地区,在春季土壤湿度比较低,日照强、风大,不采用联合作业耕作土壤,容易产生跑墒。
First, why the development of joint operations at home and abroad have proved that the combination of farming machinery has the following advantages: 1. The completion of several operations at a time, shortening the process of interval and the operation cycle, help to improve job quality and output. In many cases it is not only possible but necessary to introduce joint operations. For example, tillage and land preparation work in favor of preserving soil moisture. Subsoiling fertilization helps maintain fertilizer efficiency and reduce fertilizer loss. Especially in the arid regions of North China and Northwest China, the soil moisture in spring is relatively low, the sunshine intensity is strong, the wind is big, and it is not used in the relatively tight season of agriculture in “Three Summer” and “Sanqiu” and shortening the work cycle. Joint operations farming soil, easy to produce running moisture.