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首页> 外文会议>International Workshop of the Australian Centre for International Agricultural Research >Grain yields and nitrogen contents of rice and secondary crops grown in Sorjan and flat-bed rotation systems in Indonesia
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Grain yields and nitrogen contents of rice and secondary crops grown in Sorjan and flat-bed rotation systems in Indonesia

机译：在印度尼西亚Sorjan和扁平床旋转系统中种植水稻和次级作物的谷物产量和氮含量

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The sorjan farming system comprises a series of narrow, raised beds (ridges) and furrows used to simultaneously grow upland and lowland crops, respectively, thereby increasing crop diversity and decreasing risk of crop failure. We compared this.system with two conventional flat-bed rotation systems in terms of grain production, nitrogen uptake and economic returns in a trial held in Lampung, Indonesia. We planted rice (Oryza sativa L.; wet and dry season) in sorjan furrows and in a flat-bed lowland rotation system; maize (Zea mays L.; wet) and soybean (Glycine max L.; dry) on sorjan ridges, and rice (wet) and maize (dry) in a fiat-bed upland rotation system. Nitrogen treatments were 0, 40, 80 and 160 kg ha~(-1), with both flat-bed rotation systems receiving an additional treatment of 120 kg ha~(-1). Over the two seasons, average rice grain yield was higher for the sorjan system (3.35 t ha~(-1)) than for the fiat-bed lowland (2.94), although, in the wet season, it was slightly higher for the fiat-bed lowland. Yields for maize and soybean were low, primarily because water supply to the sorjan ridges was excessive and inadequate, respectively. Maize in the flat-bed upland yielded little because of uneven in-season rainfall distribution. Over the two seasons, the average N content of the above-ground biomass (N_(agb)) of rice was higher in the sorjan furrows than in either fiat-bed rotation system. Maize grown on sorjan ridges responded to N fertilizer by increasing N_(agb), whereas N_(agb) in soybean remained unchanged. Averaging across the two seasons, flat-bed lowland was more profitable than the sorjan system by about 13 percent, probably because the sorjan ridge crops had low market value and low yields. High-value cash crops should therefore be tried.
机译：Sorjan农业系统包括一系列狭窄，凸起的床（脊）和犁沟，用于同时增长旱地和低地作物，从而增加作物多样性和减少作物失败的风险。我们比较了这一点。在印度尼西亚兰湖举行的试验中，在粮食生产，氮气吸收和经济回报方面进行了两个传统的平板旋转系统。我们种植了米饭（Oryza Sativa L.;湿饮料）在Sorjan Furrows和扁平的低地旋转系统中;玉米（Zea Mays L.;湿）和大豆（甘氨酸最多L.;干燥）在Sorjan脊和稻米（湿）和玉米（干燥）中的山地床上旋转系统。氮气处理为0,40,80和160kg ha〜（-1），扁平床旋转系统接收120kg ha〜（-1）的额外处理。在两个赛季中，Sorjan系统的平均水稻产量更高（3.35 t Ha〜（-1））比菲亚特床低地（2.94），虽然在潮湿的季节，菲亚特略高 - 低地。玉米和大豆产量低，主要是因为索拉山脊的供水量分别过度且不足。由于季节降雨分布不均匀，均匀的卧床山区均产生少量。在两个赛季中，在Sorjan沟槽中，水稻的上述生物量（N_（AGB））的平均N含量高于诸如抗型床旋转系统。玉米在Sorjan脊上生长，通过增加N_（AGB）来应对N肥料，而大豆中的N_（AGB）保持不变。平均两季，平床低地比Sorjan系统更有利于约13％，可能是因为Sorjan岭作物的市场价值低，产量低。因此应该尝试高价值的现金作物。

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