Effects of nitrogen availability and supplementary light on the nitrate content of soil-grown lettuce

IF 1.7 4区农林科学 Q2 HORTICULTURE

Journal of Horticultural Science & Biotechnology Pub Date : 1999-01-01 DOI:10.1080/14620316.1999.11511137

D. Mccall, J. Willumsen

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引用次数: 39

Abstract

SummaryThe effect of nitrogen availability and low level supplementary light on the growth and nitrate content of butterhead lettuce (Lactuca sativa var. capitata L.) grown in soil under greenhouse conditions in winter was studied. No significant interactions between nitrogen availability and supplementary light on yield, nitrate content, osmotic potential of expressed leaf sap and component osmotica were found. Supplementary light greatly increased plant growth and resulted in earlier harvest. When harvested with similar fresh weights, plant nitrate content was significantly reduced by supplementary light although the effect was slight. The reduced contribution of nitrate to sap osmotic potential at the higher light level was accompanied by a significant increase in the contribution of sucrose. While plant fresh weight was unaffected by the rate of nitrogen application, a positive correlation between nitrate content and nitrogen application rate was found. Reduced nitrate content at low nitrogen applicat...

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氮素有效性和补光对土生生菜硝酸盐含量的影响

摘要研究了冬季温室条件下氮素有效性和低水平补光对冬小麦头莴苣生长和硝酸盐含量的影响。氮素有效性与补光对产量、硝酸盐含量、表达叶液渗透势和组分渗透没有显著的交互作用。补充光照极大地促进了植物生长，使收获提前。在鲜重相近收获时，补光可显著降低植株硝酸盐含量，但影响不大。在高光照条件下，硝酸盐对树液渗透势的贡献降低，而蔗糖的贡献显著增加。植株鲜重不受施氮量的影响，但硝态氮含量与施氮量呈正相关。低施氮降低了硝态氮含量。

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来源期刊

Journal of Horticultural Science & Biotechnology 农林科学-园艺

CiteScore

3.90

自引率

5.30%

发文量

审稿时长

3 months

期刊介绍： The Journal of Horticultural Science and Biotechnology is an international, peer-reviewed journal, which publishes original research contributions into the production, improvement and utilisation of horticultural crops. It aims to provide scientific knowledge of interest to those engaged in scientific research and the practice of horticulture. The scope of the journal includes studies on fruit and other perennial crops, vegetables and ornamentals grown in temperate or tropical regions and their use in commercial, amenity or urban horticulture. Papers, including reviews, that give new insights into plant and crop growth, yield, quality and response to the environment, are welcome, including those arising from technological innovation and developments in crop genome sequencing and other biotechnological advances.