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首页> 外文期刊>Journal of Plant Nutrition >Growth Irradiance Effects on Productivity, Photosynthesis, Nitrate Accumulation and Assimilation of Aeroponically Grown Brassica alboglabra
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Growth Irradiance Effects on Productivity, Photosynthesis, Nitrate Accumulation and Assimilation of Aeroponically Grown Brassica alboglabra

机译：生长辐照对气生式小白菜生产力，光合作用，硝酸盐积累和同化的影响

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摘要

Brassica alboglabra plants were first grown aeroponically with full nutrients under full sunlight with average midday photosynthetic photon flux density (PPFD) of 1200 mu mol m(-2) s(-1). Thirty days after transplanting, plants were respectively, subjected to 10days of average midday PPFD of 1200 (control, L1), 600 (L2) and 300 mu mol m(-2) s(-1) (L3). Productivity, photosynthetic CO2 assimilation and stomatal conductance were significantly lower in low-light (L2 and L3) plants than in high-light (L1) plants. Low light plants had the highest nitrate (NO3-) accumulation in the petioles. Low light also had an inverse effect total reduced N content. After different light treatments, all plants were re-exposed to another 10days of full sunlight. Low-light plants demonstrated their ability to recover their photosynthetic rate, enhance productivity and reduce the NO3- concentration. These results have led to the recommendation of not harvesting this popular vegetable during or immediately after cloudy weather conditions.
机译：小白菜植物首先在充满阳光的情况下通过全营养养分生长，平均中午光合光合通量密度（PPFD）为1200μmol m（-2）s（-1）。移植后第30天，分别对植物进行10天的平均中午PPFD测试，分别为1200（对照，L1），600（L2）和300μmol m（-2）s（-1）（L3）。弱光（L2和L3）植物的生产力，光合CO2同化和气孔导度显着低于高光（L1）植物。弱光植物在叶柄中硝酸盐（NO3-）积累最高。弱光也具有总氮含量降低的反作用。经过不同的光照处理后，所有植物都再次暴露于充满阳光的10天。弱光植物表现出恢复光合速率，提高生产力和降低NO3-浓度的能力。这些结果导致建议不要在多云天气条件下或之后立即收割这种受欢迎的蔬菜。

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