نتایج جستجو برای: soil substrate

تعداد نتایج: 318796  

2014
Jeanette Whitaker Nicholas Ostle Niall P. McNamara Andrew T. Nottingham Andrew W. Stott Richard D. Bardgett Norma Salinas Adan J. Q. Ccahuana Patrick Meir

Climate change is affecting the amount and complexity of plant inputs to tropical forest soils. This is likely to influence the carbon (C) balance of these ecosystems by altering decomposition processes e.g., "positive priming effects" that accelerate soil organic matter mineralization. However, the mechanisms determining the magnitude of priming effects are poorly understood. We investigated p...

برمکی, مرتضی , خیری‌زاده آروق, یونس , قربانی, حسن ,

This research was performed to study the effect of direct planting and transplanting of potato minituber on its yield and yield components. The experiment was designed as a randomized complete blocks with nine treatments and three replications. Treatments were one direct and eight indirect planting. In order to prepare the nursery, two types of pots (peat and nylon) and four types of substrates...

2015
Thomas Bourguignon Thomas Drouet Jan Šobotník Robert Hanus Yves Roisin Nicolas Chaline

In tropical rainforests, termites constitute an important part of the soil fauna biomass, and as for other soil arthropods, variations in soil composition create opportunities for niche partitioning. The aim of this study was twofold: first, we tested whether soil-feeding termite species differ in the foraging substrate; second, we investigated whether soil-feeding termites select their foragin...

2013
Dalia Janušauskaite

Adoption of sustainable tillage can protect soils from biological degradation and maintain soil quality, as compared with conventional management. This paper presents findings from a long-term tillage experiment carried out in Endocalcari-Endohypogleyic Cambisols on a sandy loam soil in Lithuania. The tillage systems were: conventional (CT), moderate (MT), and no tillage (NT). Tillage intensity...

2002
J. M. Ruiz-Lozano

Spores of three Glomus species were examined to compare the effect of long term storage under three different soil water conditions ( -0.04 MPa, -0 .8 MPa or dried) on their infective capacity. After 6 months of incubation, the infectivity tests showed that spores were affected in their potential as inoculum by soil water potential during storage. Spores from G. mosseae and G. deserticola were ...

عابدینی آبکسری, حسن , هاشم‌آبادی, داود , کاویانی, بهزاد ,

Application of bio-fertilizers and organic compounds is a way to reduce the use of chemical fertilizers. In order to study the effects of organic compounds and phosphate bio-fertilizer on some quantitative and qualitative attributes of ivy geranium (Pelargonium peltatum), a factorial experiment based on randomized complete blocks design (RCBD) was carried out using two factors including phospha...

2003
WEIXIN CHENG QIANGLI ZHANG DAVID C. COLEMAN CAROL A. HOFFMAN

It is widely known that the carbon availability in the rhizosphere is much higher than in the bulk soil. However, studies have failed to show whether microbial respiration in the rhizosphere is carbon-limited. Precise and timely measurements are lacking. We measured carbon availability index (basal respiration divided by substrate-induced respiration), and water soluble carbon in soils sampled ...

Journal: :محیط زیست طبیعی 0
سید مهدی علی زاده استادیار دانشکده کشاورزی دانشگاه کشاورزی و منابع طبیعی رامین

due to its wide industrial use, chromium is considered as a serious environmental pollutant. phytoremediation is an effective, economical and biocompatible method for remediation of contaminated soils. the present study is an attempt to assess the capability of populus alba l., for the phytoextraction of cr from a polluted loamy soil added with either cocopeat, litter and peatmoss as organic ma...

2015
Adnan Akhter Karin Hage-Ahmed Gerhard Soja Siegrid Steinkellner

Soil amendments like compost and biochar are known to affect soil properties, plant growth as well as soil borne plant pathogens. Complex interactions based on microbial activity and abiotic characteristics are supposed to be responsible for suppressive properties of certain substrates, however, the specific mechanisms of action are still widely unknown. In the present study, the main focus was...

2018
Michael Bitterlich Philipp Franken Jan Graefe

Arbuscular mycorrhizal fungi (AMF) proliferate in soils and are known to affect soil structure. Although their contribution to structure is extensively investigated, the consequences of those processes for soil water extractability and transport has, so far, gained surprisingly little attention. Therefore we asked, whether AMF can affect water retention and unsaturated hydraulic conductivity un...

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