Effects of seed priming with plant growth-promoting rhizobacteria on wheat yield and soil properties under contrasting soils

2019 ◽  
Vol 42 (17) ◽  
pp. 2080-2091 ◽  
Author(s):  
Muhammad Akbar ◽  
Nazir Aslam ◽  
Tayyaba Khalil ◽  
Shamim Akhtar ◽  
Ejaz Hussain Siddiqi ◽  
...  
Keyword(s):  
Plant Growth ◽  
Soil Properties ◽  
Wheat Yield ◽  
Plant Growth Promoting Rhizobacteria ◽  
Seed Priming ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals The Effect of Growth Activators and Plant Growth-Promoting Rhizobacteria (PGPR) on the Soil Properties, Root Yield, and Technological Quality of Sugar Beet

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1262
Author(s):  
Arkadiusz Artyszak ◽  
Dariusz Gozdowski
Keyword(s):  
Plant Growth ◽  
Sugar Beet ◽  
Soil Properties ◽  
Nitrogen Fertilization ◽  
Plant Growth Promoting Rhizobacteria ◽  
Sugar Yield ◽  
Mineral Nitrogen ◽  
Root Yield ◽  
Plant Growth Promoting ◽  
Growth Promoting

The strategy “from farm to fork” assumes a reduction in the usage of fertilizers and plant protection products in EU agriculture. The aim of this study, conducted over the years 2017–2019 in several locations in Poland, is to evaluate the application of growth activators with and without plant growth-promoting rhizobacteria to reduce mineral nitrogen fertilization without negative effects on the root yield. We studied the effect of these activators on selected soil properties. The experimental treatments included the application of the growth activators Penergetic (K + P) and Azoter, which contains the bacteria Azotobacter chroococcum, Azospirillum brasilense, and Bacillus megaterium, before sowing or during vegetation. The nitrogen rates were reduced by 30% in comparison to full nitrogen mineral fertilization (control treatment). In selected experiments, the application of Penergetic and Penergetic with Azoter caused a higher content of nitrate nitrogen (N-NO3) and ammonium nitrogen (N-NH4) after the sugar beet harvest as well as higher contents of mineral nitrogen (Nmin), P, K, and Mg in the soil in comparison to the treatment with the full dose of mineral nitrogen fertilization. The obtained results proved that it was possible to reduce the mineral application of nitrogen by 30% without a decrease in the biological and pure sugar yield, and even with an increase in the sugar yield caused by the application of the growth activators Penergetic (K + P) and Azoter.

Indigenous plant-growth-promoting rhizobacteria and chemical fertilisers: impact on wheat (Triticum aestivum) productivity and soil properties in North Western Himalayan region

2018 ◽  
Vol 69 (5) ◽  
pp. 460 ◽  
Author(s):  
Gaurav Sood ◽  
Rajesh Kaushal ◽  
Anjali Chauhan ◽  
Shaweta Gupta
Keyword(s):  
Plant Growth ◽  
Soil Properties ◽  
Plant Growth Promoting Rhizobacteria ◽  
Wheat Crop ◽  
Available N ◽  
Combined Application ◽  
Indigenous Plant ◽  
Plant Growth Promoting ◽  
Uninoculated Control ◽  
Growth Promoting

High levels of crop productivity cannot be sustained by chemical fertiliser application alone. In order to mitigate this, a 2-year study was conducted to test the effects of combined application of indigenous plant-growth-promoting rhizobacteria (PGPR) and chemical fertilisers on productivity of wheat and soil properties. Ten morphologically distinct indigenous PGPR isolates from wheat roots and rhizosphere were evaluated at Solan, Himachal Pradesh, India, during 2013–14. Three PGPR isolates (B2, SIR1 and BIS2) with maximum PGP traits were screened at different doses of nitrogen (N) and phosphorus (P) (80%, 60% and 40% of recommended fertiliser dose, RFD) under net-house conditions. Two isolates, B2 (Serratia sp.) and SIR1 (Bacillus subtilis), along with the optimum NP dose (i.e. 80% RFD) were selected for field experimentation, which was performed over two consecutive years, 2014–16. Combined application of 80% RDF of NP with PGPR (B2) significantly increased wheat yield by 9.4%, number of tillers per plant by 28.03%, grain number per spike by 19.61%, 1000-grain weight by 10.5%, and biomass by 9.2% relative to the uninoculated control with 100% RFD. Soil properties in the terms of available N, P and potassium, microbial biomass carbon, soil enzyme activities and population of phosphate-solubilising bacteria in the wheat crop were significantly increased by the combined application of bacterial inoculants with 80% RFD of NP in both years over the uninoculated control. Therefore, the results revealed the potential of indigenous PGPR isolates to supplement ~20% of NP fertilisers without hampering the soil fertility and productivity of wheat.

Effects of seed inoculation with a strain of Pseudomonas fluorescens on root growth and activity of wheat in well-watered and drought-stressed glass-fronted rhizotrons

1998 ◽  
Vol 78 (4) ◽  
pp. 545-551 ◽  
Author(s):  
K. M. Volkmar ◽  
E. Bremer
Keyword(s):  
Plant Growth ◽  
Root Growth ◽  
Pseudomonas Fluorescens ◽  
Crop Yields ◽  
Wheat Yield ◽  
Plant Growth Promoting Rhizobacteria ◽  
Triticum Aestivum L ◽  
Rooting Depth ◽  
Plant Growth Promoting ◽  
Growth Promoting

Identification of mechanisms by which plant growth-promoting rhizobacteria (PGPR) affect plants is required to obtain consistent or predictable increases in crop yields using PGPR. We conducted an outdoor lysimeter study using 12 glass-fronted rhizotrons to determine if inoculation with a strain of Pseudomonas fluorescens (G20-18) might benefit spring wheat (Triticum aestivum L.) (cv. Katepwa) yield by altering root growth. Inoculated and uninoculated treatments were either well watered or subjected to terminal drought with just one surface irrigation at anthesis. The only significant effect of G20-18 inoculation was a reduction in root growth in the well-watered rhizotrons after about 40 d. Inoculation did not significantly affect depth of rooting, soil moisture depletion, seed yield or uptake of 15N-labelled fertilizer. Watering regime did not affect overall root growth, although there were significant differences within specific depths. Final yields in well-watered treatments were double those of the drought-stressed treatments. Variability in yields within the drought-stressed treatments occurred due to accidental flooding of several rhizotrons early in the experiment, and demonstrated the value of deeply placed available moisture under drought conditions. We conclude that inoculation with G20-18 has minor effects on root growth that are unlikely to affect wheat yield. Key words: Plant growth-promoting rhizobacteria, rhizobacteria, roots, rooting depth, rhizotrons, N use efficiency, drought

Aplikasi Bacillus subtilis pada beberapa Bahan Organik terhadap Pertumbuhan dan Produksi Tanaman Cabai Rawit (Capsicum frutescens L.)

2020 ◽  
Vol 21 (1) ◽  
pp. 14-19
Author(s):  
Praptiningsih Gamawati Adinurani ◽  
Sri Rahayu ◽  
Nurul Fima Zahroh
Keyword(s):  
Bacillus Subtilis ◽  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Capsicum Frutescens ◽  
Plant Growth Promoting ◽  
Growth Promoting

Mikroba Bacillus subtilis merupakan agen pengendali hayati mempunyai kelebihan sebagai Plant Growth Promoting Rhizobacteria (PGPR) yaitu dapat berfungsi sebagai biofertilizer, biostimulan, biodekomposer dan bioprotektan. Tujuan penelitian mengetahui potensi B. subtilis dalam merombak bahan organik sebagai usaha meningkatkan ketersediaan bahan organik tanah yang semakin menurun. Penelitian menggunakan Rancangan Petak Terbagi dengan berbagai  bahan organik sebagai petak utama (B0 = tanpa bahan organik, B1 = kotoran ayam,  B2 = kotoran kambing, B3 = kotoran sapi) dan aplikasi B.subtilis sebagai anak petak (A0 = 0 cc/L, A1 = 5cc/L, A2 = 10 cc/L, Pengamatan meliputi variabel tinggi tanaman, indeks luas daun, jumlah buah per tanaman, berat buah per tanaman, dan bahan organik tanah. Data pengamatan  dianalisis ragam  menggunakan  Statistical Product and Service Solutions (SPSS) versi 25 dan dilanjutkan dengan uji Duncan untuk mengetahui signifikansi perbedaan antar perlakuan. Hasil penelitian menunjukkan tidak terdapat interaksi antara bahan organik kotoran ternak dan konsentrasi B. subtilis terhadap semua variabel pengamatan. Potensi B. subtilis sangat baik dalam mendekomposisi bahan organik yang ditunjukkan dengan peningkatan bahan organik, dan hasil terbaik pada kotoran  sapi (B3) dan konsentrasi B. subtilis 15 mL/L masing-masing sebesar 46.47 % dan 34.76 %. Variabel pertumbuhan tidak berbeda nyata kecuali tinggi tanaman dengan pertambahan tinggi paling banyak pada pemberian kotoran kambing sebesar 170.69 %.

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