Effects of Fertilizer Levels on the Absorption, Translocation, and Distribution of Phosphorus and Potassium in Rice Cultivars with Different Nitrogen-Use Efficiencies

• DOI: 10.5539/jas.v8n11p38
• Publication Date: 2016-10-12T06:34:13Z
• Authors: Yongjian Sun; Yuanyuan Sun; Hui Xu; Chunyu Wang; Zhiyuan Yang; Na Li; Fengjun Yan; Yinghong Li; Haiyue Wang; Jun Ma
• Keywords: 0106 biological sciences; 2. Zero hunger; 15. Life on land; 01 natural sciences; 6. Clean water

<p>The fertilizer management and the selection of rice cultivars play a vital role in production to maximize yield minimize cost. Many researches have elucidated combined increase nitrogen (N) accumulation N use efficiency (NUE) different genotypes, however, accumulation, translocation, distribution phosphorus (P) potassium (K), correlation N, P K absorption characteristics their relationships with grain NUE is still obscure. For this purpose, two differing were chosen for study, one high-NUE (Dexiang 4103) other low-NUE (Yixiang 3724). Fertilizers applied at three levels, including low (75 kg N·hm<sup>-2</sup>, 37.5 P<sub>2</sub>O<sub>5</sub>·hm<sup>-2</sup>, 75 K<sub>2</sub>O·hm<sup>-2</sup>), medium (150 150 high rate (225 112.5 225 K<sub>2</sub>O·hm<sup>-2</sup>). A no-N treatment was included each level as control. The results showed that there obvious interacting effects levels on yield, well translocation K. Rice exhibited markedly stronger total spikelets leaves, compared levels. opposite trend observed main growth stages, stem leaf sheaths. Compared treatments, application NPK fertilizers promoted nutrient increased harvest index, facilitated vegetative organs, ultimately improved both cultivars. equilibrium relationship between indicated associated cultivar could reach more than 10,000 hm<sup>-2</sup>, P, requirements 180.8-213.3, 47.3-54.7, 223.5-259.1 respectively. Additionally, analysis revealed during stages significantly (P < 0.05) related This study suggested varieties also has efficiencies, indicating conventional screening or efficiencies can be varieties. period from heading maturity helpful maintain high-yield production.</p>