Abstract Greenhouse vegetable cultivation is often associated with the rapid accumulation of nitrate in soils. Therefore, N management strategies are needed for greenhouse vegetable production systems. The objective of the present study was to evaluate the effects of a summer catch crop on vegetable crop yields. Maize, as an N catch crop, was planted in leafy vegetable (garland chrysanthemum) and fruit vegetable (green soybean) greenhouse cropping systems during the summer of two consecutive years. Maize removed 4.9–11.8 g N m−2 from the greenhouse soil and also improved soil penetration resistance. The first year cultivation of maize increased the yield of garland chrysanthemum leaves but not the yield of green soybean. In first year, the yield of garland chrysanthemum showed negative correlation with SPAD value and nitrate content in leaves, while the yield of green soybean was positively correlated with shoot fresh weight and dry weights of roots and nodules. During the second year, cultivation of the catch crop clearly increased the yield of both garland chrysanthemum and green soybean. Positive correlations were observed between yield and SPAD value in garland chrysanthemum, and between yield and nodule dry weight in green soybean, respectively. These results indicate that using maize as a catch crop in soil with excessive N accumulation can improve soil conditions and promote subsequent crop growth. However, the effect of catch crop cultivation on yield was dependent on the type of subsequent crop.

中文翻译：

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富氮土壤中玉米作为捕捞作物对后续花环菊和绿豆产量的影响

摘要 温室蔬菜栽培往往与土壤中硝酸盐的快速积累有关。因此，温室蔬菜生产系统需要氮管理策略。本研究的目的是评估夏季捕捞作物对蔬菜作物产量的影响。玉米作为氮肥作物，连续两年夏季种植叶菜（花环菊）和果菜（绿豆）大棚种植系统。玉米从温室土壤中去除了 4.9–11.8 g N m-2，还提高了土壤渗透阻力。玉米第一年种植增加了花环菊花叶的产量，但没有增加绿豆的产量。第一年花环菊产量与叶片SPAD值和硝酸盐含量呈负相关，而绿豆产量与地上部鲜重、根茎干重呈正相关。在第二年，收获作物的种植明显增加了花环菊花和绿豆的产量。花环菊产量与SPAD值呈正相关，青豆产量与根瘤干重呈正相关。这些结果表明，在氮积累过多的土壤中使用玉米作为捕获作物可以改善土壤条件并促进随后的作物生长。然而，作物种植对产量的影响取决于后续作物的类型。种植捕捞作物明显提高了花环菊和绿豆的产量。花环菊产量与SPAD值呈正相关，青豆产量与根瘤干重呈正相关。这些结果表明，在氮积累过多的土壤中使用玉米作为捕获作物可以改善土壤条件并促进随后的作物生长。然而，作物种植对产量的影响取决于后续作物的类型。种植捕捞作物明显提高了花环菊和绿豆的产量。花环菊产量与SPAD值呈正相关，青豆产量与根瘤干重呈正相关。这些结果表明，在氮积累过多的土壤中使用玉米作为捕获作物可以改善土壤条件并促进随后的作物生长。然而，作物种植对产量的影响取决于后续作物的类型。这些结果表明，在氮积累过多的土壤中使用玉米作为捕获作物可以改善土壤条件并促进随后的作物生长。然而，作物种植对产量的影响取决于后续作物的类型。这些结果表明，在氮积累过多的土壤中使用玉米作为捕获作物可以改善土壤条件并促进随后的作物生长。然而，作物种植对产量的影响取决于后续作物的类型。