Hydroponic lettuce production influenced by integrated supplemental light levels in a controlled environment agriculture facility: Experimental results

被引：39

作者：

Both, AJ ^{[1
]}

Albright, LD ^{[1
]}

Langhans, RW ^{[1
]}

Reiser, RA ^{[1
]}

Vinzant, BG ^{[1
]}

机构：

[1] Cornell Univ, Dept Agr & Biol Engn, Ithaca, NY 14853 USA

来源：

THIRD INTERNATIONAL SYMPOSIUM ON ARTIFICIAL LIGHTING IN HORTICULTURE | 1997年 / 418期

关键词：

D O I：

10.17660/ActaHortic.1997.418.5

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Bibb lettuce (Lactuca sativa L., cv. Ostinata) was grown in peat-vermiculite plugs placed in a recirculating hydroponic (NFT) system. Supplemental lighting was used to reach different PPFtarget levels in each of 35 treatments. A second order exponential polynomial was developed to predict DW accumulation for PPFtarget levels between 8 and 22 mol m(-2) d(-1). Little difference in DW production was noted between lettuce grown under daytime and nighttime lighting. Tipburn was prevented using a fan blowing greenhouse air vertically down onto the lettuce plants. Marketable (150 g FW) lettuce heads were produced in 24 days after transplant while receiving an average PPFtarget of 17 mol m(-2) d(-1).

引用

页码：45 / 51

页数：7