巴西根瘤菌在提高尼日利亚南几内亚草原minna豇豆固氮和产量中的共生效应

O. A. Adediran, A. O. Osunde, A. Bala, M. Dianda, H. Ibrahim, O. Olufajo, J. Oladiran
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引用次数: 0

摘要

为了评价两株巴西根瘤菌对豇豆(Vigna unguiculata (L.))固氮和生产力的促进作用。Walp)在尼日利亚的几内亚南部稀树草原,于2016年和2017年进行了现场试验。采用完全随机区组设计,将4个根瘤菌接种水平(对照、接种BR 3262、BR 3267和施用90 Kg N ha)和3个品种(IT93K-452-1、IT99K573-1-1和TVx 3236)进行分组。接种br3267在2017年显著增加了27%的根瘤数,两年内各品种对接种的反应在根瘤重方面存在显著差异。施用90 Kg氮肥的植株在两年内的结瘤数、重和有效结瘤率均最低。施氮和未接种的植株吸收氮量和地上部生物量显著高于接种了BR菌的植株。两个菌株接种植株的固氮量显著低于未接种植株。然而,与未接种植株相比,接种植株将更多的氮分配给种子,其种子中蛋白质含量显著高于未接种植株。施用90 kg氮肥的植株籽粒产量最高(1761.2 kg hm2),与未接种植株(1479.60 kg hm2)相当,但显著高于接种植株(1320.1 ~ 1338.0 kg N hm2)。因此,本研究的BR菌株在提高研究区豇豆的固氮和生产力方面并不比本地菌株更有效。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
SYMBIOTIC EFFECTIVENESS OF BRAZILIAN RHIZOBIAL STRAINS IN IMPROVING N-FIXATION AND PRODUCTIVITY OF COWPEA IN MINNA, SOUTHERN GUINEA SAVANNA OF NIGERIA
In a bid to evaluate the effectiveness of two Brazilian rhizobial strains in improving nitrogen fixation and productivity of cowpea (Vigna unguiculata (L.) Walp) in the southern Guinea savanna of Nigeria, field trials were conducted in 2016 and 2017. Four rhizobial inoculation levels (control, inoculation with BR 3262, BR 3267 and application of 90 Kg N ha) and three varieties (IT93K-452-1, IT99K573-1-1 and TVx 3236) were arranged in randomized complete block design. Inoculation with BR 3267 significantly increased nodule number by 27% over the control in 2017 and there was significant variation in the response of the varieties to inoculation in the two years in respect of nodule weight. Plants fertilized with 90 Kg N ha consistently had the least number of nodules, weight and percentage of effective nodules in the two years. N-uptake and shoot biomass yield was however significantly higher in the N-fertilized and uninoculated plants than plants inoculated with the BR strains. Plants inoculated with both strains fixed significantly lower nitrogen than the uninoculated plants. However, the inoculated plants partitioned greater nitrogen to their seeds having significantly higher % protein in their seeds than the uninoculated plants. Plants fertilized with 90 kg Nha had the highest grain yield (1761.2 kg ha) which was at par with the value recorded in the uninoculated plants (1479.60 Kg ha) but significantly higher than the values recorded in the inoculated plants (1320.1-1338.0 Kg N ha). It could therefore be concluded that the BR strains tested in this study are not more effective than the indigenous strain in improving N-fixation and productivity of cowpea in the study area.
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