Effects of reduced nitrogen and suitable soil moisture on wheat(Triticum aestivum L.) rhizosphere soil microbiological,biochemical properties and yield in the Huanghuai Plain,China

【Author】

ZHOU Su-mei;ZHANG Man;ZHANG Ke-ke;YANG Xi-wen;HE De-xian;YIN Jun;WANG Chen-yang;College of Agronomy,Henan Agricultural University;Institute of Plant Nutrient and Environmental Resources,Henan Academy of Agricultural Sciences;

【Institution】

College of Agronomy,Henan Agricultural University;Institute of Plant Nutrient and Environmental Resources,Henan Academy of Agricultural Sciences;

【Abstract】

Soil management practices affect rhizosphere microorganisms and enzyme activities, which in turn influence soil ecosystem processes. The objective of this study was to explore the effects of different nitrogen application rates on wheat(Triticum aestivum L.) rhizosphere soil microorganisms and enzyme activities, and their temporal variations in relation to soil fertility under supplemental irrigation conditions in a fluvo-aquic region. For this, we established a split-plot experiment for two consecutive years(2014–2015 and 2015–2016) in the field with three levels of soil moisture: water deficit to no irrigation(W1), medium irrigation to(70±5)% of soil relative moisture after jointing stage(W2), and adequate irrigation to(80±5)% of soil relative moisture after jointing stage(W3); and three levels of nitrogen: 0 kg ha~(–1)(N1), 195 kg ha~(–1)(N2) and 270 kg ha~(–1)(N3). Results showed that irrigation and nitrogen application significantly increased rhizosphere microorganisms and enzyme activities. Soil microbiological properties showed different trends in response to N level; the highest values of bacteria, protease, catalase and phosphatase appeared in N2, while the highest levels of actinobacteria, fungi and urease were observed in N3. In addition, these items performed best under medium irrigation(W2) relative to W1 and W3; particularly the maximum microorganism(bacteria, actinobacteria and fungi) amounts appeared at W2, 5.37×10~7 and 6.35×10~7 CFUs g–1 higher than those at W3 in 2014–2015 and 2015–2016, respectively; and these changes were similar in both growing seasons. Microbe-related parameters fluctuated over time but their seasonality did not hamper the irrigation and fertilization-induced effects. Further, the highest grain yields of 13 309.2 and 12 885.7 kg ha~(–1) were both obtained at W2 N2 in 2014–2015 and 2015–2016, respectively. The selected properties, soil microorganisms and enzymes, were significantly correlated with wheat yield and proved to be valuable indicators of soil quality. These results clearly demonstrated that the combined treatment(W2 N2) significantly improved soil microbiological properties, soil fertility and wheat yield on the Huanghuai Plain, China.

【Keywords】

suitable soil moisture;;nitrogen-reduction;;rhizosphere soil;;microorganisms;;rhizosphere soil enzyme activity;;winter wheat(Triticum aestivum L.)

References

To explore the background and basis of the node document

Springer Journals Database

Total: 49 articles

  • [1] MA Dong-Yun,GUO Tian-Cai,SONG Xiao,WANG Chen-Yang,ZHU Yun-Ji,WANG Yong-Hua,YUE Yan-Jun,CHA Fei-NaHenan Agricultural University /National Engineering Research Center for Wheat,Zhengzhou 450002,China, Effects of urea application rate on the quantity of microorganisms and activity of enzymes in wheat rhizosphere, Acta Ecologica Sinica,
  • [2] Cai Hong Shen Renfang (State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China)$$$$, DETERMINATION OF SOIL PROTEASE ACTIVITY WITH MODIFIEDNINHYDRIN COLORIMETRY, Acta Pedologica Sinica,
  • [3] SONG Ni;SUN Jing-sheng;WANG Jing-lei;CHEN Zhi-fang;LIU Zu-gui;Farmland Irrigation Research Institute,Chinese Academy of Agricultural Sciences /Ministry of Agriculture Key Laboratory of Crop Water Requirement and Regulation;, Temporal and spatial variation of water requirement of winter wheat and its influencing factors in Henan Province,China, Chinese Journal of Applied Ecology,
  • [4] ZHOU Su-Mei;ZHANG Ke-Ke;ZHANG Man;LI Lei;ZHANG Chun-Li;YIN Jun;HE De-Xian;College of Agronomy,Henan Agricultural University/National Engineering Research Centre for Wheat/Collaborative Innovation Center of Henan Grain Crops;, Nitrogen-Reducing and Suitable Soil Moisture Enhance Photosynthetic Potential of Flag Leaf and Grain Yield in Winter Wheat, Acta Agronomica Sinica,

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