Journal of Food, Agriculture and Environment

Effects of combined nitrogen fertilizer and nano-carbon application on yield and nitrogen use of rice grown on saline-alkali soil

Author(s):

Lili Fan ¹, Yunhe Wang ², Xiwen Shao ^1*, Yanqiu Geng ¹, Zhichun Wang ², Yun Ma ³, Jian Liu ⁴

Recieved Date: 2011-09-16, Accepted Date: 2012-01-07

Abstract:

To investigate the effects of combined application of nitrogen fertilizer and nano-carbon on nitrogen use of soil and rice yield, six treatments were applied as a randomized complete block design with three replications including A₁ (N 215 kg hm^-2 + nano-carbon 1.194 kg hm^-2), B₁ (N 215 kg hm^-2), A₂ (N 150.5 kg hm^-2 + nano-carbon 0.836 kg hm^-2), B₂ (N 150.5 kg hm^-2), A₃ (N 107.5 kg hm^-2 + nano-carbon 0.597 kg hm^-2) and B₃ (N 107.5 kg hm^-2), respectively, to a rice cv. Changbai 10. The soil total and available N, the N accumulation, dry matter accumulation of aerial part and the yield components such as spike number, filled spike number, 1000-grain weight and yield of O. sativa were studied. The result indicated that significant differences in nitrogen use of saline-alkali soil and yield were observed among the treatments and the deliverability of soil nutrition, the nitrogen uptake of plant, dry matter accumulation and yield significantly increased after combined application of nitrogen fertilizer and nano-carbon. The nitrogen accumulation of rice of A₁, A₂ and A₃ treatments were 13.23%, 9.57% and 38.14% higher than B₁, B₂ and B₃ treatments, respectively; total nitrogen residues of soil of A₁, A₂ and A₃ treatments were 6.95%, 8.48% and 9.65% lower than B₁, B₂ and B₃ treatments, respectively; dry biomass of aerial part of A₁, A₂ and A₃ treatments were 58%, 15.7% and 19.3% higher than B₁, B₂ and B₃ treatments, respectively. The yield of all treatments combined application of N and nano-carbon were higher than those in treatments where only applied nitrogenous fertilizer was applied, compared to B₁, B₂ and B₃ treatments, the yield of A₁, A₂ and A₃ treatments were 18.36%, 8.51% and 10.19% higher, respectively. There was no significant difference between the yield of A₂ and B₁, which indicated that the yield of combined application of 70% conventional fertilizer and nano-carbon (N 150.5 kg hm^-2 and nano-carbon 0.836 kg hm^-2) was equal to that with supplied 100% conventional fertilizer (N 215 kg hm^-2). This indicated that the utilization rate of nitrogen fertilizer increased after combined application of nano-carbon, which can save the N fertilizer in production practice. Therefore, combined treatment is suitable to application and dissemination in soda saline-alkali soil in the agriculture.

Keywords:

Saline-alkali soil, nano-carbon, rice, nitrogen, yield

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Journal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 1
Category: Agriculture
Pages: 558-562

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