Strayer R F
The Bionetics Corporation, Kennedy Space Center, FL, USA.
Adv Space Res. 1994 Nov;14(11):357-66. doi: 10.1016/0273-1177(94)90322-0.
This overview covers the basic microbial ecology of recirculating hydroponic solutions. Examples from NASA and Soviet CELSS tests and the commercial hydroponic industry will be used. The sources of microorganisms in nutrient solutions include air, water, seeds, plant containers and plumbing, biological vectors, and personnel. Microbial fates include growth, death, and emigration. Important microbial habitats within nutrient delivery systems are root surfaces, hardware surfaces (biofilms), and solution suspension. Numbers of bacteria on root surfaces usually exceed those from the other habitats by several orders of magnitude. Gram negative bacteria dominate the microflora with fungal counts usually much lower. Trends typically show a decrease in counts with increasing time unless stressed plants increase root exudates. Important microbial activities include carbon mineralization and nitrogen transformations. Important detrimental interactions include competition with plants, and human and plant pathogenesis.
本综述涵盖了循环水培溶液的基本微生物生态学。将采用来自美国国家航空航天局（NASA）和苏联受控生态生命支持系统（CELSS）测试以及商业水培行业的实例。营养液中微生物的来源包括空气、水、种子、植物容器及管道、生物媒介和人员。微生物的归宿包括生长、死亡和迁移。营养液输送系统内重要的微生物栖息地是根表面、硬件表面（生物膜）和溶液悬浮液。根表面的细菌数量通常比其他栖息地的细菌数量高出几个数量级。革兰氏阴性菌在微生物区系中占主导地位，真菌数量通常要低得多。除非受胁迫的植物增加根系分泌物，否则随着时间的推移，数量趋势通常会下降。重要的微生物活动包括碳矿化和氮转化。重要的有害相互作用包括与植物的竞争以及对人和植物的致病作用。
