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首页> 外文期刊>Horticultura Brasileira >The use of sunn hemp as green manure intercropped with taro
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The use of sunn hemp as green manure intercropped with taro

机译：使用sun麻作芋头绿肥

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An experiment was carried out in Magé, Rio de Janeiro State, Brazil, to evaluate the performance of taro (Colocasia esculenta) intercropped with sunn hemp (Crotalaria juncea), used as green manure. A randomized blocks design with four replicates was used and the soil of the field plots was classified as Haplic Gleysol. Treatments consisted of taro (1) intercropped with unpruned sunn hemp, (2) intercropped with sunn hemp cut at soil level, (3) intercropped with sunn hemp pruned at its mid-height, and (4) in monoculture. The taro was planted in double rows spaced by 1.0 m. The planting furrows had a space of 0.5 m, with rhizomes placed at every 3.0 m. The experimental plot consisted of four 3.0 m rows and the useful area corresponded to the five central plants in each of the two central rows. The sunn hemp was sown in parallel lines in the spaces between the taro double rows, 120 days after planting the taro. When the sunn hemp was cut at soil level, an accumulation of 211 kg ha-1 of N was observed. Besides this, the sunn hemp's biomass promoted the cycling of an average 17 kg ha-1 of P, 85 kg ha-1 of K, 151 kg ha-1 of Ca, and 27 kg ha-1 of Mg. Worth mentioning, it represented also a deposition of 6.85 Mg ha-1 of dry substance. Even when pruned at its mid-height, the sunn hemp still provided 60% of nutrients relatively to the treatment in which it was cut at soil level. In addition to the nutrient supply, the use of taro intercropped with sunn hemp cut at soil level or pruned at mid-height represented efficient alternatives for controlling the spontaneous vegetation and for reducing taro leaf burning by solar radiation, without compromising the yield of taro. In all intercropping systems, taro plants had a larger leaf area and were taller than plants in monoculture.
机译：在巴西里约热内卢州的麦哲市进行了一项实验，以评估芋头（Colocasia esculenta）间作sun麻（Crotalaria juncea）间作绿肥的性能。使用具有四个重复的随机区组设计，田间田地的土壤分类为Haplic Gleysol。处理方法包括芋头（1）在未修剪的大麻麻间作，（2）在土壤水平上修剪的大麻麻间作，（3）在中间高度修剪的大麻麻间作，和（4）单作。将芋头以1.0m的双排种植。种植沟的间距为0.5 m，每3.0 m放置根茎。实验地块由四个3.0 m行组成，有用区域对应于两个中心行中每一个的五个中心植物。芋头种植后120天，在芋头两排之间的空间中以平行线播种了sun麻。在土壤水平上切下麻麻后，观察到累积了211 kg ha-1的氮。除此之外，sun麻的生物量还促进了平均17 kg ha-1的P，85 kg ha-1的K，151 kg ha-1的Ca和27 kg ha-1的镁的循环。值得一提的是，它还沉积了6.85 Mg ha-1的干燥物质。即使在中等高度修剪时，相对于在土壤水平上进行切割的处理，the麻仍可提供60％的养分。除提供养分外，在土壤水平上切下的sun麻或中间高度修剪的芋头还可以作为控制自发植被和减少太阳辐射引起的芋头叶燃烧而不损害芋头产量的有效替代品。在所有间作系统中，芋头植物的叶面积都比单一栽培的植物高。

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