N-15(2)-STUDIES ON ACTIVITY OF NON-SYMBIOTIC NITROGEN-FIXATION IN RICE-FIELD SOILS OF KRASNODAR TERRITORY

被引:0
作者
KALININSKAYA, TA [1 ]
MILLER, YM [1 ]
BELOV, YM [1 ]
RAO, VR [1 ]
机构
[1] ACAD SCI USSR, INST MICROBIOL, MOSCOW V-71, USSR
来源
IZVESTIYA AKADEMII NAUK SSSR SERIYA BIOLOGICHESKAYA | 1977年 / 04期
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中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
The activity of nonsymbiotic N fixation constituted 3-9 kg N/ha per mo. When treated with 5-10 tons of straw/ha N-fixing activity increased up to 20-40 kg N/ha per mo. Conventionally used N fertilizer rates (100-200 kg N/ha) did not inhibit nonsymbiotic N fixing organisms. During seasonal growth rice plants utilized 18-29% of biological N fixed by soil bacteria.
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页码:565 / 570
页数:6
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