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首页> 外文期刊>Folia Horticulturae >The effect of various light conditions and different nitrogen forms on nitrogen metabolism in pepper fruits.
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The effect of various light conditions and different nitrogen forms on nitrogen metabolism in pepper fruits.

机译：各种光照条件和不同氮素形态对辣椒果实氮素代谢的影响。

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The 'Spartacus' F1 sweet pepper was grown in a plastic tunnel on rockwool during 2006-2008. A fertigation technique was used for water and fertiliser application. The tunnel was divided into two parts covered with different plastic films. The first part of the tunnel was covered with a film that transmitted less light than the film covering the second part. In both parts of the tunnel, the plants were divided into two groups. One group of plants was fertilised with just nitrate nitrogen (100% N-NO3) and the other one with three forms of nitrogen (N-NO3:N-NH4:N-NH2 in a ratio of 50:13:37). Fruits were harvested mature green and red. Concentrations of nitrate and ammonium ions as well as total nitrogen and free amino acids were analysed in the plant material. Nitrate and nitrite reductase activities were also investigated, and dry matter content and soluble sugars were also determined. Higher light intensity increased nitrate concentration in red pepper fruits but decreased ammonium ion content. These tendencies were not as obvious in green fruits. In most cases, red fruits fertilised with three nitrogen forms accumulated more nitrates than those fertilised with N-NO3. This observation was similar in the case of green fruits. In most cases, pepper fruits accumulated more ammonium ions in the case of N-NO3 fertilisation than when three forms of nitrogen were applied, but the differences were not always statistically significant. Higher nitrate reductase activity was observed in the case of better light conditions as well as mixed nitrogen fertilisation in red pepper fruits. No differences were observed in the case of nitrite reductase activity between fruits harvested from various treatments in red and also green fruits, with some exceptions. The green fruits of pepper had higher nitrate reductase activity than the red ones. It can be summarised that various light conditions influenced the nitrogen metabolism of pepper fruits as well as the different nitrogen forms applied with fertilisers.
机译：在2006-2008年期间，“斯巴达克斯（Spartacus）” F 1 甜椒生长在岩棉上的塑料隧道中。施肥技术用于水和肥料的施用。隧道被分为两部分，覆盖有不同的塑料薄膜。隧道的第一部分覆盖有一层薄膜，该薄膜的透光率比覆盖第二部分的薄膜少。在隧道的两个部分，植物都分为两组。一组植物仅用硝酸盐氮（100％N-NO 3 ）施肥，另一组只用三种形式的氮（N-NO 3 ：N-NH）施肥。 4 ：N-NH 2 的比例为50:13:37）。果实采收成熟的绿色和红色。分析了植物材料中硝酸盐和铵离子的浓度以及总氮和游离氨基酸。还研究了硝酸盐和亚硝酸盐还原酶的活性，还测定了干物质含量和可溶性糖。较高的光照强度会增加红辣椒果实中的硝酸盐浓度，但会降低铵离子含量。这些趋势在绿色水果中不那么明显。在大多数情况下，施肥有三种氮素的红色水果累积的硝酸盐量要高于施以N-NO 3 的植物。在绿色水果的情况下，这一观察结果相似。在大多数情况下，施N-NO 3 肥料比以三种形式施氮时，胡椒果实积累更多的铵离子，但差异并不总是统计学上显着的。在更好的光照条件下以及在红辣椒果实中混合施氮的情况下，观察到较高的硝酸还原酶活性。在红色和绿色水果中，从各种处理收获的水果之间，亚硝酸还原酶活性没有观察到差异。胡椒的绿色果实比红色的果实具有更高的硝酸还原酶活性。可以总结出，各种光照条件都影响辣椒果实的氮代谢以及肥料中施用的不同氮素形式。

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