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Soybean‐Rhizobium Combination for Tolerance to Low P‐High Aluminum
Author(s) -
Taylor R. W.,
Sistani K. R.,
Patel S.
Publication year - 1990
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1990.tb00834.x
Subject(s) - microbial inoculant , loam , bradyrhizobium , shoot , agronomy , inoculation , biology , cultivar , dry weight , horticulture , bradyrhizobium japonicum , rhizobium , rhizobiaceae , symbiosis , soil water , bacteria , ecology , genetics
Two greenhouse experiments were conducted to evaluate the performance of selected soybean‐ Bradyrhizobium combinations in a soil having low P‐high aluminum stresses under controlled conditions. Growth parameters such as plant height, nodule numbers, dry weight, nitrogenase activity and seed yield were used as an index. Three selected acid (low P‐high Al) tolerant ( Essex, Tracy and Bedford ) and three sensitive ( Peking, Hill and McNair 600 ) soybean ( Glycine max ) varieties were sown in each pot. Three of the most tolerant strains of Bradyrhizobium (USDA 6, 110, 122), a mixture of these strains, and a commercial inoculant (Nitragin) were used to inoculate the Hartselle sandy loam soil. The results indicated that soil acidity significantly affected the soybean Bradyrhizobium symbiosis. The combination of variety Tracy plus Nitragin (mixed‐strain) produced the highest and variety Peking plus mix‐strain Nitragin the lowest plant height at all pH levels. Plants inoculated with Nitragin had higher shoot dry weight and seed yields. Variety Essex in combination with Nitragin produced the highest seed yields at all pH levels. Plants inoculated with Nitragin developed significantly more nodules than the other strains except for variety Peking. There was no significant difference in total nodule numbers between tolerant and sensitive soybean varieties at all soil pH levels except for Nitragin. Shoot total N did not increase by increasing the pH level or by using different variety‐strain combinations.