Effects of long-term application of chemical and organic fertilizers on the abundance of microbial communities involved in the nitrogen cycle

Sun, Run‐Cang; Guo, Xisheng; Wang, Daozhong; Chu, Haiyan

doi:10.1016/j.apsoil.2015.06.010

Cited by 242 publications

(114 citation statements)

References 55 publications

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“…This was also observed by Sun et al . [51]. The significantly higher ratio of G + /G − observed in NPK (Fig 5f) was consistent with Billings and Ziegler [52] but different from results of Giacometti et al .…”

Section: Discussionsupporting

confidence: 75%

Effects of inorganic and organic amendment on soil chemical properties, enzyme activities, microbial community and soil quality in yellow clayey soil

et al. 2017

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Understanding the effects of external organic and inorganic components on soil fertility and quality is essential for improving low-yielding soils. We conducted a field study over two consecutive rice growing seasons to investigate the effect of applying chemical fertilizer (NPK), NPK plus green manure (NPKG), NPK plus pig manure (NPKM), and NPK plus straw (NPKS) on the soil nutrient status, enzyme activities involved in C, N, P, and S cycling, microbial community and rice yields of yellow clayey soil. Results showed that the fertilized treatments significantly improved rice yields over the first three experimental seasons. Compared with the NPK treatment, organic amendments produced more favorable effects on soil productivity. Notably, the NPKM treatment exhibited the highest levels of nutrient availability, microbial biomass carbon (MBC), activities of most enzymes and the microbial community. This resulted in the highest soil quality index (SQI) and rice yield, indicating better soil fertility and quality. Significant differences in enzyme activities and the microbial community were observed among the treatments, and redundancy analysis showed that MBC and available N were the key determinants affecting the soil enzyme activities and microbial community. The SQI score of the non-fertilized control (0.72) was comparable to that of the NPK (0.77), NPKG (0.81) and NPKS (0.79) treatments but significantly lower compared with NPKM (0.85). The significant correlation between rice yield and SQI suggests that SQI can be a useful to quantify soil quality changes caused by different agricultural management practices. The results indicate that application of NPK plus pig manure is the preferred option to enhance SOC accumulation, improve soil fertility and quality, and increase rice yield in yellow clayey soil.

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Section: Discussionsupporting

confidence: 75%

Effects of inorganic and organic amendment on soil chemical properties, enzyme activities, microbial community and soil quality in yellow clayey soil

et al. 2017

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“…The positive P effect on ammonia oxidizer communities in our study could be attributed to the enhancement of soil microbial activity and diversity, in line with some previous studies. Sun et al (2015) reported that soil available P was the most important factor influencing the abundance of functional communities that were involved in the nitrogen cycle and regulated the abundance of nitrogen cycle communities. Chu et al (2007) found differences in DGGE banding patterns of the amoA gene between control and PKenriched plots in agricultural soils after 16 years of fertilization.…”

Section: Effects Of Fertilization On the Microbial Respiration Rate Amentioning

confidence: 99%

Vegetable yields and soil biochemical properties as influenced by fertilization in Southern China

Gai

Liu

Zhai

et al. 2016

Applied Soil Ecology

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“…However, seed considered bacterial endophytes are not particularly examined. In contrast, fertilizers have a key role in the promotion of plant growth and intensification of agricultural productivity, but the long-term use of synthetic chemical fertilizers on agricultural fields is a major threat to environmental pollution [31]. Therefore, the use of bacterial endophytes can be a good alternative to chemical fertilizers because they are eco-friendly and promote plant growth [22].…”

Section: Introductionmentioning

confidence: 99%

Indoleacetic acid production and plant growth promoting potential of bacterial endophytes isolated from rice (Oryza sativa L.) seeds

Shahzad

Waqas

Khan

et al. 2017

Acta Biologica Hungarica

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Bacterial endophytes from the phyllosphere and rhizosphere have been used to produce bioactive metabolites and to promote plant growth. However, little is known about the endophytes residing in seeds. This study aimed to isolate and identify seed-borne bacterial endophytes from rice and elucidate their potential for phytohormone production and growth enhancement. The isolated endophytes included Micrococcus yunnanensis RWL-2, Micrococcus luteus RWL-3, Enterobacter soli RWL-4, Leclercia adecarboxylata RWL-5, Pantoea dispersa RWL-6, and Staphylococcus epidermidis RWL-7, which were identified using 16S rRNA sequencing and phylogenetic analysis. These strains were analyzed for indoleacetic acid (IAA) production by using GC-MS and IAA was found in the range of 11.50 ± 0.77 µg ml -1 to 38.80 ± 1.35 µg ml -1 . We also assessed the strains for plant growth promoting potential because these isolates were able to produce IAA in pure culture. Most of the growth attributes of rice plants (shoot and root length, fresh and dry biomass, and chlorophyll content) were significantly increased by bacterial endophytes compared to the controls. These results show that IAA producing bacterial endophytes can improve hostplant growth traits and can be used as bio-fertilizers.

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Effects of long-term application of chemical and organic fertilizers on the abundance of microbial communities involved in the nitrogen cycle

Cited by 242 publications

References 55 publications

Effects of inorganic and organic amendment on soil chemical properties, enzyme activities, microbial community and soil quality in yellow clayey soil

Effects of inorganic and organic amendment on soil chemical properties, enzyme activities, microbial community and soil quality in yellow clayey soil

Vegetable yields and soil biochemical properties as influenced by fertilization in Southern China

Indoleacetic acid production and plant growth promoting potential of bacterial endophytes isolated from rice (Oryza sativa L.) seeds

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