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[1]GUO Xinnian,SUN Jiao,LIANG Jinxiu,et al.Effects of Phosphorus Fertilization on Yield and Nitrogen, Phosphorus Uptake and Use Efficiency of Rice in the Yellow River Irrigation Region of Ningxia[J].Research of Soil and Water Conservation,2019,26(02):49-54,61.

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Effects of Phosphorus Fertilization on Yield and Nitrogen, Phosphorus Uptake and Use Efficiency of Rice in the Yellow River Irrigation Region of Ningxia

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 02 Page number: 49-54,61 Column: Public date: 2019-04-28

Title:: Effects of Phosphorus Fertilization on Yield and Nitrogen, Phosphorus Uptake and Use Efficiency of Rice in the Yellow River Irrigation Region of Ningxia

Author(s):: GUO Xinnian¹, SUN Jiao¹, LIANG Jinxiu¹, ZHOU Tao¹, LI Yongxiang², XUE Caixia³, TIAN Xudong³; 1. Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China;
2 High Quality Seeding Breeding Farm of Qingtongxia Municipality, Qingtongxia, Ningxia 751600, China;
3 Agricultural Comprehensive Development Office of Qingtongxia Municipality, Qingtongxia, Ningxia 751600, China

Keywords:: phosphorus fertilization; Ningxia Yellow River irrigation region; rice yield; nitrogen uptake and utilization; phosphorus uptake and utilization

CLC:: S143.2

DOI:: -

Abstract:: With respect to the unreasonable application of phosphorus fertilizer in Yellow Irrigation Area of Ningxia, we set up field trials in the irrigation area in order to determine suitable application of phosphorus in rice production in Yellow Irrigation Area of Ningxia. The rice variety ’Jie No.3’ was used as the test material, and a single factor random group test design experiment was conducted to examine the impact of P application rates (0, 75, 150， 225 kg/hm²) on grain yield, the accumulation of NO₃^--N and NH₄⁺-N, as well as N and P uptake and utilization of rice. The results showed that, compared with the no application of P, all treatments with P application increased the spike number, kernels per spike and seed setting rate of rice, which significantly increased the grain yield of rice. The grain yield under treatment of 150 kg/hm² P application rate was higher than that of other P application treatments, which had the highest rice yield of 7 593.11 kg/hm², and production increase rate of 36.12%. P fertilization reduced the total accumulation of NO₃^--N and NH₄⁺-N in 0-100 cm soil layers. In addition, P application increased N and P uptake of rice at different growth stages, especially for 150 kg/hm² P application treatment. With the P application of 150 kg/hm², the N uptake efficiencies and N harvest indices of rice were relatively higher. P application decreased the P grain production efficiencies and P uptake efficiencies, while the maximum of P harvest index was observed at the P application of 150 kg/hm². In conclusion, phosphorus fertilizer significantly improved the yield, nitrogen and phosphorus absorption and utilization efficiency of rice in the Yellow River irrigation area of Ningxia. The suitable phosphorus application was 150 kg/hm² in the region.

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