tailieunhanh - Effect of Zn application on rhizosphere acidification in rice and wheat varieties of varying Zn sensitivity

Healthy seeds of different varieties of rice (PD 6, NDR 359, PD 16 and PS 5) and wheat (UP 262, UP 2628, PBW 175 and UP 2554) were germinated and fourteen days after germination, young rice/wheat seedlings were transferred to half strength of Hogland solution (pH ) containing either recommended levels of Zn ( mg Zn L-1 ) or no Zn for four days. For solidification of medium w/v agar- agar was mixed in the Hogland solutions of both –Zn and +Zn. Prior to solidification, mL of bromothymol blue dye solution prepared in 60 % ethanol and was mixed to agar nutrient solution. Twenty five mL of nutrient agar medium with +Zn or –Zn was poured in glass petri plates of 10 cm diameter and one seedling of each rice/wheat variety from +Zn or –Zn lot was transferred to the respective nutrient agar medium in duplicate. The colour change near roots under +Zn and –Zn were monitored and photographs were taken after 48 hrs in case of rice and 72 hrs in case of wheat for recording the extent of change in colour of the nutrient medium in the rhizosphere of all the rice and wheat varieties. In rice NDR 359 substantially reduced the pH in vicinity of roots (more yellow area around roots) than in Zn sufficient medium indicating possibly a better activity of the proton efflux pump to enhance Zn uptake under Zn deficient conditions. In Zn deficient conditions, Zn inefficient genotype UP 262 failed to substantially reduce pH in the vicinity of roots (less yellow areas around the roots) however, this variety under Zn sufficient conditions could reduce the pH of the growth medium (more yellowing around the roots). | Effect of Zn application on rhizosphere acidification in rice and wheat varieties of varying Zn sensitivity

• Hoá học
• Zn application
• Rice and wheat varieties
• Varying Zn sensitivity
• Rhizosphere acidification in rice
• Zn application on rhizosphere acidification
• Available P and Z
• Zn application in soils
• Variable available P
• Zn and comparison
• Different extraction methods
• Zn application on root growth parameters
• Cowpea genotypes
• Root and shoot characteristics
• Shoot dry matter content
• Very late sowing
• Wheat varieties
• Zinc application
• Zinc use efficiencies
• Triticum aestivum L
• Pre harvest application
• Zn on yield of mango
• Quality of mango
• Investigate the role of calcium
• Boron and zinc on yield
• Terms—adsorption
• Magnetite Zn Al layered double hydroxide
• Organic matter removal
• Supplying water
• Dissolved organic compounds
• Micro nutrients (Fe and Zn)
• Foliar application
• 3rd and 6th leaf stage
• Gladiolus (Gladiolus grandiflorus L )
• Flowering characters of gladiolus
• Micro nutrients on growth
• Maize yield
• Zn fractions
• Grain yield of maize
• Zinc fertilizer levels
• Application methods on zinc fractions
• Zinc sulphate
• Zn EDTA
• Foliar spray
• Greengram (Vigna radiate L )
• Yield of Greengram
• Foliar application of zinc
• High P soil
• Phosphorus fixation
• P fertility Regime
• Crop in high p soil
• Supplemental enhancement of nitrogen