EFFECTS OF MEMBRANE FILTRATION ON ORGANIC-MATTER AND VIABLE BACTERIA IN RECIRCULATING NUTRIENT SOLUTIONS IN GREENHOUSES

被引：2

作者：

LILLO, C ^{[1
]}

BJORDAL, V ^{[1
]}

JOHANSEN, K ^{[1
]}

NETTELAND, T ^{[1
]}

PEDERSEN, RE ^{[1
]}

SVENDSEN, E ^{[1
]}

SOLVBERG, L ^{[1
]}

RUOFF, P ^{[1
]}

GRIMSTAD, SO ^{[1
]}

机构：

[1] SAERHEIM AGR RES STN,N-4062 KLEPP STASJON,NORWAY

来源：

ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE | 1993年 / 43卷 / 02期

关键词：

CUCUMIS-SATIVUS; BACTERIAL NUMBERS; ORGANIC CARBON; PHENOLS; SUGARS;

D O I：

10.1080/09064719309411227

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Cucumbers were grown in nutrient film systems with (A) recirculation of solution and (B) membrane filtration and recirculation of solution. Samples of the nutrient solutions were taken during May-August. Nutrient solution in circulation without membrane filtration contained on average 23 ppm TOC (total organic carbon), while the filtered nutrient solution contained 15 ppm TOC. Spectrophotometric analysis of the samples showed a clear correlation of absorbance at 295 nm with TOC. The spectrometric data are compatible with tannin- and lignin-like material as the main organic residues in the nutrient solution. Membrane-filtered nutrient solutions were rapidly reinfected with bacteria, and filtered and non-filtered nutrient solutions flowing to the plants did not differ with regard to the number of bacteria.

引用

页码：121 / 124

页数：4

共 15 条

[1] RELEASE OF ORGANIC-SUBSTANCES BY CEREAL ROOTS INTO SOIL [J].