Rhizobium inoculation and phosphate fertilization effects on productive and qualitative traits of guar (Cyamopsis tetragonoloba (L.) Taub.)
Rhizobium inoculation and phosphate fertilization effects on productive and qualitative traits of guar (Cyamopsis tetragonoloba (L.) Taub.)
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DOI：
10.1016/j.indcrop.2019.111513
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发表时间：
2019-11
影响因子：
5.9
通讯作者：
F. Gresta;C. Trostle;O. Sortino;C. Santonoceto;G. Avola
中科院分区：
文献类型：
--
作者：
F. Gresta;C. Trostle;O. Sortino;C. Santonoceto;G. Avola
Guar (Cyamopsis tetragonoloba(L.) Taub.), a grain legume grown in India, Pakistan and the United States, draws interest for irrigated environments in the Mediterranean areas. A limitation to widespread guar adaptation in this environment is its low capability to develop N-fixingRhizobiumnodulation. A study was conducted in South-Eastern Sicily, Italy in 2005 and 2006, to examine three levels ofRhizobiuminoculation (non-inoculated, inoculated at sowing, inoculated at sowing plus at the third true leaf) and two levels of applied phosphorus fertilizer (0 and 40 kg ha−1P). Plant height, pods per plant, seed yield, number of nodules per plant and seed galactomannan content were measured. No significant difference was found due to year of cultivation. Plant height was not significantly affected byRhizobiumor P fertilizer. Phosphorus fertilizer promoted the number of pods per plant, especially when bacteria inoculation was applied. Seed yield was significantly increased by inoculation and phosphorus levels. Inoculant caused a significant increase in seed yield (by 34%) from 2.2 t ha-1(I0) to 3.4 t ha-1(I2), whereas phosphorus application enhanced yields by 18% when P0(2.7 t ha-1) were compared with P40plots (3.3 t ha-1). Without inoculant there was no nodulation, whereas the number of nodules per plant increased to 14 in plots with the highest level of inoculation. Fertilizer P application did not affectRhizobiumnodulation. Galactomannan content was not influenced by inoculation and P fertilization, however increased seed yield resulting from inoculation and P fertilization led to increased galactomannan production per hectare.
