Increasing water productivity, nitrogen economy, and grain yield of rice by water saving irrigation and fertilizer-N management

被引:39
作者
Aziz, Omar [1 ]
Hussain, Saddam [2 ]
Rizwan, Muhammad [3 ]
Riaz, Muhammad [1 ]
Bashir, Saqib [1 ]
Lin, Lirong [1 ]
Mehmood, Sajid [1 ]
Imran, Muhammad [1 ]
Yaseen, Rizwan [4 ]
Lu, Guoan [1 ]
机构
[1] Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Hubei, Peoples R China
[2] Univ Agr Faisalabad, Dept Agron, Faisalabad 38040, Pakistan
[3] Huazhong Agr Univ, Microelement Res Ctr, Wuhan 430070, Hubei, Peoples R China
[4] Bahauddin Zakariya Univ, Fac Agr Sci & Technol, Dept Soil Sci, Multan 60800, Pakistan
关键词
Water productivity; Irrigation methods; Grain yield; N-15; tracer; Nitrogen use efficiency; Nitrogen leaching; LOWLAND RICE; DRYING IRRIGATION; USE EFFICIENCY; PADDY SOILS; N-15-LABELED UREA; ROOT-GROWTH; PLANT; CHINA; RECOVERY; REGIMES;
D O I
10.1007/s11356-018-1855-z
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The looming water resources worldwide necessitate the development of water-saving technologies in rice production. An open greenhouse experiment was conducted on rice during the summer season of 2016 at Huazhong Agricultural University, Wuhan, China, in order to study the influence of irrigation methods and nitrogen (N) inputs on water productivity, N economy, and grain yield of rice. Two irrigation methods, viz. conventional irrigation (CI) and "thin-shallow-moist-dry" irrigation (TSMDI), and three levels of nitrogen, viz. 0 kg N ha(-1) (N-0), 90 kg N ha(-1) (N-1), and 180 kg N ha(-1) (N-2), were examined with three replications. Study data indicated that no significant water by nitrogen interaction on grain yield, biomass, water productivity, N uptake, NUE, and fertilizer N balance was observed. Results revealed that TSMDI method showed significantly higher water productivity and irrigation water applications were reduced by 17.49% in TSMDI compared to CI. Thus, TSMDI enhanced root growth and offered significantly greater water saving along with getting more grain yield compared to CI. Nitrogen tracer (N-15) technique accurately assessed the absorption and distribution of added N in the soil crop environment and divulge higher nitrogen use efficiency (NUE) influenced by TSMDI. At the same N inputs, the TSMDI was the optimal method to minimize nitrogen leaching loss by decreasing water leakage about 18.63%, which are beneficial for the ecological environment.
引用
收藏
页码:16601 / 16615
页数:15
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