Effect of sanitized and non-sanitized sewage sludge on soil microbial community and the physiology of pepper plants

Pascual, Inmaculada; Avilés, Manuel; Aguirreolea, Jone; Sánchez‐Díaz, Manuel

doi:10.1007/s11104-008-9626-0

Cited by 35 publications

(36 citation statements)

References 53 publications

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“…Significant correlations (not shown) were found between disease severity and total dry matter production (0.62***) and the number of days until the first wilting symptoms appeared (−0.56***), revealing a clear relationship between disease severity and plant growth. In non-inoculated plants, application of sewage sludge increased plant growth (21-203%) and fruit yield (28-75%), in line with previous reports (Arancon et al 2004;Casado-Vela et al 2007;Pascual et al 2008). Within these ranges, the lowest and highest increases corresponded to application of 15% ATAD and 30% composted sewage sludge, respectively.…”

Section: Discussionsupporting

confidence: 89%

“…In line with this, in a separate experiment using ATAD as amendment, leaf concentrations of heavy metals were similar in presence or absence of the sewage sludge (Pascual et al 2008). Electric conductivity of the substrate amended with 45% composted sewage sludge reached 3.17 dS m −1 (see Table 4), which points out salinity as a putative cause for the enhancement of the deleterious effect of V. dahliae.…”

Section: Discussionsupporting

confidence: 71%

“…From these data, it can be concluded that composted wastes improve vegetative growth more than growth of reproductive organs (fruit yield). The increased growth and yield have been previously attributed directly to nutrient availability (Pascual et al 2008) and presence of humic acids (HA) (Sun et al 2006), and indirectly to increased soil rhizosphere microorganisms activity (Pascual et al 2008), through the production of growth-stimulating plant hormones (Frankenberger and Arshad 1995). In this report, we have shown increased sewage sludge-mediated soil respiration, indicative of higher microorganisms activity.…”

Section: Discussionmentioning

confidence: 99%

“…Soil microbial activity was assessed by measuring soil respiration in hermetically sealed flasks, in which a 30-g soil sample was kept in the dark at 28°C and 60% of its water holding for 33 days. The CO 2 emitted was measured daily with an infrared gas analyser (IRGA) (HCM-100, Walz) (Pascual et al 2008). …”

Section: Photosynthetic Pigmentsmentioning

confidence: 99%

“…Some aspects of the use of sewage sludge are well documented, but not other. There is a wealth of information on the nutritional effect of this waste on plant performance (Antolín et al 2005;Barzegar et al 2002;Casado-Vela et al 2007;Pascual et al 2008). However, there is a lack of data worldwide on their effect on plant diseases, which calls for further studies.…”

Section: Introductionmentioning

confidence: 99%

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Growth, yield and physiology of Verticillium-inoculated pepper plants treated with ATAD and composted sewage sludge

et al. 2009

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A greenhouse experiment was conducted to investigate the impact of sanitized sewage sludges, ATAD (aerobic thermophilic autothermic digestion) and composted, on Verticillium-induced wilt in pepper plants (Capsicum annuum L. cv. Piquillo). Two doses of ATAD (15 and 30% v/v) and three of composted sludge (15, 30 and 45% v/v) were applied to a peatbased potting mix. Unamended substrate was included as control. Half of the plants were inoculated with V. dahliae, whereas the other half remained noninoculated. Result showed that ATAD and composted sludge increased growth and yield of non-inoculated plants. V. dahliae reduced net photosynthesis (P n ), mainly as a consequence of stomatal closure, 5 weeks after pathogen inoculation. The actual photosystem II efficiency was also reduced and consequently the electron transport rate (ETR). No photoinhibitory damage was observed at this time in diseased plants. At the end of the experiment, diseased plants showed lower plant biomass and fruit yield. ATAD sludge had little effect on the disease. Compost slightly alleviated Verticillium-induced wilt when applied at lower doses (15% v/v), which resulted in increased P n and ETR, and higher plant biomass and fruit yield. By contrast, higher doses of compost (45% v/v) enhanced the effect of the pathogen, which was related to the high substrate salinity in this treatment.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionsupporting

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Section: Photosynthetic Pigmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Growth, yield and physiology of Verticillium-inoculated pepper plants treated with ATAD and composted sewage sludge

et al. 2009

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Growth and development of pepper are affected by humic substances derived from composted sludge

Azcona

Pascual

Aguirreolea

et al. 2011

Z. Pflanzenernähr. Bodenk.

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A greenhouse experiment was conducted to evaluate the effects of humic substances extracted from composted sewage sludge on growth, phenological development, and photosynthetic activity of pepper (Capsicum annuum L. cv. Piquillo) plants. Humic substances derived from composted sludge (HSS) were compared with those derived from leonardite (HSL). Two doses of both humic substances were assayed (200 and 500 mg C [L substrate] -1 ) and compared with a control (C). HSS showed higher nitrogen content and a higher percentage of aliphatic carbon, as well as a lower content of aromatic and phenolic carbon than HSL. HSS significantly increased plant dry-matter production (up to 560%), plant height (86%-151%), and leaf area (436%-1397%) during the early stages of pepper development. Net photosynthesis and stomatal conductance increased in the treatments with HSS (up to 48% and 63%, respectively) at the vegetative stage. In addition, HSS accelerated the phenological development of pepper plants, reducing significantly the number of days to flowering and ripening, which occurred 12 and 14 d earlier than in control plants, respectively. In general, the treatments with HSS and HSL did not markedly affect chlorophyll and nutrient concentrations in the leaves. At maturity, only small differences in total fruit yield, number of fruits per plant, and fruit size were observed between amended and control plants. The results suggest that the mechanisms through which HSS affected plant growth and development were not associated with an improved nutrient uptake. Although the identity of the growth-promoting factors remains to be found, the results suggest that they may be linked to the chemical structure of the humic substances.

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Do Composts Affect the Soil Microbial Community?

2009

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Effect of sanitized and non-sanitized sewage sludge on soil microbial community and the physiology of pepper plants

Cited by 35 publications

References 53 publications

Growth, yield and physiology of Verticillium-inoculated pepper plants treated with ATAD and composted sewage sludge

Growth, yield and physiology of Verticillium-inoculated pepper plants treated with ATAD and composted sewage sludge

Growth and development of pepper are affected by humic substances derived from composted sludge

Do Composts Affect the Soil Microbial Community?

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