Effects of strip intercropping of potatoes with non-hosts on late blight severity and tuber yield in organic production
Effects of strip intercropping of potatoes with non-hosts on late blight severity and tuber yield in organic production
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DOI：
10.1111/j.1365-3059.2008.01860.x
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发表时间：
2008-10-01
期刊：
影响因子：
2.7
通讯作者：
Finckh, M. R.
中科院分区：
文献类型：
--
作者：
Bouws, H.;Finckh, M. R.
在德国进行的大规模田间试验中，研究了马铃薯与谷物或草三叶草混合在主风向和垂直于主风向的带状种植对叶片晚疫病严重程度和块茎产量的影响。在每个地块的12-18个切片中评估疾病进展，并从相同切片确定产量。在2000年，样地大小为3 × 10米，没有明显的疾病减少，由于样地间的干扰。在2001年和2002年，与6 × 18和6 × 36米的地块大小的带状种植马铃薯，疾病显着减少了9-20%和4- 12%，分别与纯林马铃薯相比，最大的减少垂直于风种植的地块和草三叶草包围。减少病害的最重要因素是地块外接种物的损失和邻近非马铃薯宿主的屏障效应。根据品种和年份，病害进展曲线下面积仅能解释总产量变化的0-20%。在一年中，病害对中抗品种产量的影响高于感病品种。这可能是由于膨胀行为的差异造成的。在减产方面，养分限制似乎比病害更重要。在所有3年中，直接与谷物相邻的边缘马铃薯行的产量显着降低，但谷物的竞争并没有改变疾病-产量-损失的关系。带状间作可能是一个有用的组成部分，在整体管理策略，以减少传入晚疫病接种。
The effects of strip cropping of potatoes with cereals or a grass-clover mix in and perpendicular to the main wind direction on foliar late blight severity and tuber yield were studied in large-scale field experiments in Germany. Disease progress was assessed in 12-18 sections per plot and yields determined from the same sections. In 2000, plot size was 3 x 10 m and there were no disease reductions apparently due to interplot interference. In 2001 and 2002, with plot sizes of 6 x 18 and 6 x 36 m in strip-cropped potatoes, disease was significantly reduced by 9-20% and 4-12%, respectively, compared to pure stands of potato, with the greatest reductions in plots planted perpendicular to the wind and neighboured by grass-clover. The most important factors contributing to disease reduction were loss of inoculum outside of the plots and barrier effects of neighbouring non-potato hosts. Only 0-20% of the overall yield variation could be explained by the area under the disease progress curve, depending on cultivar and year. In one year disease effects on the yield of a moderately resistant cultivar were higher than on the yield of a susceptible cultivar. This was probably caused by differences in bulking behaviour. Nutrient limitation appeared to be more important than disease in reducing yields. Yields in the edge potato rows directly neighboured by cereals were significantly reduced in all 3 years, but competition by cereals did not change the disease-yield-loss relationship. Strip intercropping might be a useful component in an overall management strategy to reduce incoming late blight inoculum.