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Impact of above-ground dry matter residue from cover crops on fall-winter corn and springsummer soybean yield under no-tillage system

机译:免耕制度下覆盖作物地上干物质残留对秋冬玉米和春夏大豆产量的影响

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Due to the high temperature and moisture in the region of Brazilian “Cerrado”, the greatest challenge in no-till system is the maintenance of above-ground dry matter. The aim of this research was to assess the above-ground dry matter production from cover crops and its effects on soybean and corn yield in Brazilian “Cerrado”. The experiment was carried out from 2012 to 2014 growing seasons. The experimental design was randomized blocks with four repetitions. The treatments (T) adopted were formed by different cover crops [fall-winter corn crop (T1); intercropping fall-winter corn with Brachiaria ruziziensis (T2); intercropping fall-winter corn with Brachiaria brizantha cv. Marandu (T3); intercropping fall-winter corn with Crotalaria spectabilis (T4); B. ruziziensis (T5); B. brizantha cv. Marandu (T6); Penisetum glaucum L. (T7) and reference area (T8)]. The above-ground dry matter productions were influenced by the treatments assessed through two growing seasons (2012/2013 and 2013/2014). There was interaction between the cover crops and growing seasons for above-ground dry matter of the cover crops. In relation to fall-winter corn yield, the cover crops and growing seasons showed significant effect on corn yield. The cover crops effect on soybean yield. The cultivation of intercropping fall-winter corn crop with B. brizantha cv. Marandu or this forage grass single showed higher production of above- ground dry matter, these values reached quantities over than 6 Mg ha-1. The soybean crop yield decreased because of the above- ground dry matter production of the cover crop of B. brizantha cv. Marandu and the intercropping fall-winter corn with B. brizantha cv. Marandu.
机译:由于巴西“塞拉多”地区的高温和湿气,免耕系统的最大挑战是维持地上干物质。这项研究的目的是评估巴西“塞拉多”地表作物的地上干物质生产及其对大豆和玉米单产的影响。该实验是在2012年至2014年的生长季节进行的。实验设计是具有四个重复的随机区组。所采用的处理方式(T)是由不同的覆盖作物[秋冬玉米作物(T1);间作秋冬玉米与Brachiaria ruziziensis(T2);套种秋冬季玉米与Brachiaria brizantha cv。 Marandu(T3);套种秋冬玉米与猪屎豆(T4); B.ruziziensis(T5); B. Brizantha简历马兰杜(T6);青草(T7)和参考区域(T8)]。地上干物质的生产受到两个生长季节(2012/2013和2013/2014)评估的处理方法的影响。覆盖作物地上干物质的覆盖作物与生长季节之间存在相互作用。关于秋冬玉米的产量,覆盖作物和生长季节对玉米的产量有显着影响。覆盖作物对大豆产量的影响。 B. brizantha cv。种植间作秋冬玉米作物。 Marandu或这种草料单草显示出较高的地上干物质产量,这些值的量超过6 Mg ha-1。大豆作物产量下降是因为B. brizantha cv的地被作物地上干物质生产。 Marandu和间种的秋冬玉米与B. brizantha cv。马兰杜

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