GGE BIPLOT ANALYSIS BASED SELECTION OF SUPERIOR CHICKPEA (CICER ARIETINUM L.) INBRED LINES UNDER VARIABLE WATER ENVIRONMENTS

摘要

This study determined (a) the activity of the selected enzymes of C (invertase and cellulase), N (urease), P (acidphosphatase, AcP and alkaline phosphatase, AlkP) cycling, as well as soil microbial biomass carbon (SMBC) in therhizosphere of Agave angustifolia Haw. (maguey espadín) cultivated in valley, hill and mountain soils in Tlacolula, Oaxaca(Mexico), and (b) changes in selected biochemical soil properties associated with seasonality and plant age. Three magueyespadín plantations with two replicates per topography were selected. Rhizosphere soil sampling was carried out for oneyear. AcP and urease activities were highest in mountain sites. AlkP and cellulase activities were highest in hill andmountain sites. Invertase activity and SMBC were not different among sites. Phosphatase activity showed no temporalchanges. Cellulase and invertase activities were highest in December; maximum urease activity was in October andFebruary. SMBC was highest in August. AcP activity was highest in 0-2 years old plants. AlkP activity and SMBC werehighest in 2.1-4 years old plants. Urease, cellulase and invertase activity was not affected by plant age. Significant effectsfor the site×seasonality×plant age interaction suggest that biochemical soil properties were influenced by site. Mountainsoils displayed the highest enzyme activity, which can accelerate soil organic matter turnover and contribute to the longtermsustainability of maguey espadín cropping under rainfed conditions.