POTENTIAL FOR INCREASING N-2 FIXATION OF FIELD PEA THROUGH SOIL-MANAGEMENT AND GENOTYPE

被引：7

作者：

EVANS, J

CHALK, PM

OCONNOR, GE

机构：

[1] Agricultural Research Institute, NSW Agriculture, PMB, Wagga Wagga, NSW

[2] School of Agriculture and Forestry, University of Melbourne, Parkville, VIC

来源：

BIOLOGICAL AGRICULTURE & HORTICULTURE | 1995年 / 12卷 / 02期

关键词：

D O I：

10.1080/01448765.1995.9754730

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The effects of incorporation of straw in soil, liming and genotype on N-2 fixation by field pea were evaluated in glasshouse experiments using the N-15 isotope dilution technique. Soil treatment with the equivalent of 2.5 to 10 t straw ha(-1) reduced soil NO3- and soil N uptake by pea, which increased the proportion of pea N derived from N, fixation: from 0.67 (nil straw) to a maximum of 0.96 (10 t straw ha(-1)). Total fixed N was increased depending on Rhizobium inoculation method and cultivar. When soil and seed were both inoculated, fixed N increased from 153 mg N pot(-1) (nil straw) to 240 mg N pot(-1) (10 t straw ha(-1)) when the cultivar was Dundale. The amount of N, fixed by pea in response to fertilizer N addition (the equivalent of 50 kg N ha(-1)) varied significantly with genotype. Total fixed N increased with increasing pH over the range of 3.9 to 4.5 or 4.1 to 4.7 in two soils. In one of these (Book Book) the increase in fixed N was nearly 50% of the nil lime control.

引用

页码：97 / 112

页数：16

共 28 条

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