- Turkish Journal of Agriculture and Forestry
- Volume:33 Issue:1
- The Effects of Four Organic Soil Conditioners on Aggregate Stability, Pore Size Distribution, and Re...
The Effects of Four Organic Soil Conditioners on Aggregate Stability, Pore Size Distribution, and Respiration Activity in a Sandy Loam Soil
Authors : Shokrollah ASGHARI, Mohammad Reza NEYSHABOURI, Fariborz ABBASI, Nasser ALIASGHARZAD, Shahin OUSTAN
Pages : 47-55
View : 18 | Download : 8
Publication Date : 2009-02-01
Article Type : Research Paper
Abstract :In coarse-textured soils, low water and nutrient holding capacity due to the high number of macropores limits crop growth. To minimize these limitations the application of various soil conditioners insert ignore into journalissuearticles values(SCs); has been extensively used in recent decades. The objective of this study was to investigate the influences of anionic polyacrylamide insert ignore into journalissuearticles values(PAM);, cattle manure insert ignore into journalissuearticles values(M);, vermicompost insert ignore into journalissuearticles values(VC);, and biological sludge insert ignore into journalissuearticles values(BS); as organic SCs on mean weight diameter insert ignore into journalissuearticles values(MWD); of aggregates, water aggregate stability insert ignore into journalissuearticles values(WAS);, pore size distribution insert ignore into journalissuearticles values(PRSD);, and respiration activity insert ignore into journalissuearticles values(RA); of a sandy loam soil. PAM insert ignore into journalissuearticles values(0.25 and 0.5 g kg-1 of air-dried soil);, M insert ignore into journalissuearticles values(12.5 and 25 g kg-1 of air-dried soil);, VC insert ignore into journalissuearticles values(2.5 and 5 g kg-1 of air-dried soil);, and BS insert ignore into journalissuearticles values(1.7 and 3.4 g kg-1 of air-dried soil); were mixed with soil and uniformly packed into large and small pots, and then incubated in a greenhouse with FC moisture content of 0.7-0.8 and temperature of 22 ± 4 °C for 6 months. Large pots were used for soil sampling in order to measure MWD, WAS, and PRSD at 7, 30, 60, 120, and 180 days. Respiration activity was measured at the same times in small pots. All SCs, irrespective of their concentrations, significantly insert ignore into journalissuearticles values(PKeywords : Soil conditioner, mean weight diameter, pore size distribution, soil respiration, water aggregate stability