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Lablab Density and Planting-Date Effects on Growth and Grain Yield in Maize-Lablab Intercrops

机译:玉米-Lablab间作的Lablab密度和播种期对生长和籽粒产量的影响

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摘要

Incorporation of legumes into the predominantly smallholder maize monoculture systems in the Limpopo Province of South Africa adds to soil fertility and animal and human nutrition. Lablab (Lablabpurpureus) has been found to be well adapted to the dry environment of the Limpopo Province and has the potential to be intercropped with maize. Its potential for prolific growth requires that lablab is well managed if the staple maize yield is to be maintained or enhanced. Field experiments were established in the 2001/02 and 2002/03 seasons at two locations to test the effect of two relative planting dates of lablab - namely, simultaneously with maize, and 28 days later, as well as lablab planting densities of 2,4,6,8 and 10 plants/m, on the grain yield of maize and biomass accumulation of the component crops in a row intercropping system. Grain yield reduction generally occurred when maize was simultaneously planted with lablab, except at densities of two and four lablab plants/m in one season. When lablab was planted later, the associated maize produced yields that were similar to or enhanced compared to the maize by itself. Maize dry-matter yields were reduced at lablab densities beyond four plants/m whereas lablab dry-matter accumulation increased with increasing density.
机译:在南非的林波波省,将豆科植物纳​​入主要为小农户的玉米单一栽培系统,增加了土壤肥力以及动物和人类的营养。已发现Lablab(Lablabpurpureus)非常适合林波波省的干旱环境,并有可能与玉米间作。如果要维持或提高玉米主粮的产量,它的多产潜力需要对实验室进行良好的管理。在2001/02和2002/03的两个季节建立了田间试验,以测试Lablab的两个相对播种日期的影响-即与玉米同时播种,以及28天后,以及2,4的Lablab播种密度种植间作系统中,分别达到,6、8和10植株/米,这对玉米的产量和组成作物的生物量积累具有重要作用。玉米与lablab同时播种通常会导致谷物单产下降,除了在一个季节以每平方米两和四株lablab的密度种植玉米。后来种植了lablab时,相关的玉米单产与玉米本身相似或提高。超过4株/ m的lablab密度,玉米干物质产量降低,而lablab干物质积累随密度增加而增加。

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