| Cite this article: | 赵学梅,刘笑吟,黄涛,等.不同氨基酸水溶肥处理对控灌水稻生长和产量的影响[J].灌溉排水学报,2022,(10):-. |
| Zhao Xuemei,Liu Xiaoyin,Huang Tao,et al.不同氨基酸水溶肥处理对控灌水稻生长和产量的影响[J].灌溉排水学报,2022,(10):-. |
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| Effects of different treatments of amino acid water-soluble fertilizer on rice growth under controlled irrigation condition |
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Zhao Xuemei1, Liu Xiaoyin2, Huang Tao2, Liu Yi3, LIU BoYi2, XU Junzeng2
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1.河海大学农业科学与工程学院;2.Hohai University;3.Nanjing Water Planning and Designing Institute Corp, Ltd.
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| Abstract: |
| 【Objective】Nitrogen fertilizer plays an important role in rice growth and rice yield, but excessive fertilization and low fertilizer utilization rate have always been the prominent problems perplexing rice production in China. In order to alleviate the water crisis, ensure food security, and reduce environment costs caused by the application of nitrogen fertilizer, it is of great practical significance to select the best fertilization treatment under water-saving irrigation practice in the rice field. 【Method】A field trial was conducted by introducing the amino acid water-soluble fertilizer treatment (CWSF) into a water-saving irrigated rice field and applied in more times at a lower dosage along with each irrigation event. The effects of different application rates and ratios of amino acid water-soluble fertilizer on rice growth, yield and nitrogen uptakes were studied. Compared with traditional fertilization treatment (CF), the amino acid water-soluble fertilizer treatment (CWSF244) with a nitrogen application rate of 244kg hm-2, the amino acid water-soluble fertilizer treatment with a nitrogen rate of 214kg hm-2 (CWSF214), and the amino acid water-soluble fertilizer treatment with a nitrogen rate of 184kg hm-2 (CWSF184) was designed in 2018. On this basis, the minimum nitrogen application rate (214 kg hm-2) under the condition of ensuring rice yield and not reducing total nitrogen uptake was selected as the total amount of amino acid water-soluble fertilizer fertilization control in the second year of this experiment, and three treatments with different nitrogen application ratios were set: CWSF214-I1, CWSF214-I2 and CWSF214 -I3. 【Result】The results showed that there were no significant differences in canopy height, tiller number and chlorophyll content (SPAD) value between the treatment of CWSF and CF treatment. Although the nitrogen application rate of amino acid water soluble fertilizer was lower, the physiological growth indexes of rice under the treatment of amino acid water soluble fertilizer were not significantly lower than that under the traditional fertilization treatment. The application of amino acid water-soluble fertilizer could improve the ratio of grain nitrogen uptake to the total nitrogen, with the nitrogen use efficiency, even though the application of nitrogen was applied in less dose. The nitrogen absorption efficiency of CWSF244, CWSF214 and CWSF184 treated with amino acid water-soluble fertilizer were 44.32%, 46.71% and 50.04%, respectively, which were significantly increased by 19.01%, 25.43% and 34.37%, respectively, compared with 37.24% that farmers were used to fertilizing. The yields of CWSF244, CWSF214 and CWSF184 were 8865.67, 8655.55 and 8468.07 kg hm-2 respectively, which had no significant difference compared with CF treatment. Comprehensive analysis showed that CWSF214 treatment was the minimum nitrogen application rate, which could increase grain nitrogen absorption and utilization of nitrogen fertilizer under the precondition of rice yield guaranteed. The research of rice yield under different fertilization ratio treatments found that the rice yields under CWSF214-I1, CWSF214-I2 and CWSF214-I3 treatments were 9140.14, 9211.32 and 9151.11 kg hm-2, which were all higher than that of CF treatment (8742.05 kg hm-2), with the rate of growth of 4.55%, 5.37% and 4.68%, respectively. What’s more, the nitrogen absorption efficiency of CWSF214-I1 and CWSF214-I2 increased by 18.09% and 27.46% respectively, compared with CF, and grain nitrogen content increased by 13.38% and 11.41% respectively. 【Conclusion】the transfer of nitrogen to panicle and the absorption of nitrogen were promoted by increasing panicle fertilizer, with the same total nitrogen application rate, and then can improve the yield of rice effectively. CWSF214-I1 and CWSF214-I2 treatments, with the higher yield, are the recommended fertilization strategy for controlling irrigated rice fields in the middle and lower reaches of the Yangtze River. |
| Key words: rice; controlled irrigation; nitrogen application rate; nitrogen application ratio; amino acid water-soluble fertilizer; plant growth; yield |
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