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[1]WANG Baojun,JIN Haigang,ZHANG Hongmei,et al.Effects of Nitrogen Application on Late Single Season Japonica Rice Growth, Soil Nutrient and Carbon Pool Under Full Straw Returning in Northern Zhejiang Province[J].Research of Soil and Water Conservation,2021,28(02):60-66.

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Effects of Nitrogen Application on Late Single Season Japonica Rice Growth, Soil Nutrient and Carbon Pool Under Full Straw Returning in Northern Zhejiang Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 02 Page number: 60-66 Column: Public date: 2021-02-06

Title:: Effects of Nitrogen Application on Late Single Season Japonica Rice Growth, Soil Nutrient and Carbon Pool Under Full Straw Returning in Northern Zhejiang Province

Author(s):: WANG Baojun¹, JIN Haigang², ZHANG Hongmei¹, SHEN Yaqiang¹, CHEN Gui³, LU Chenni³, CHENG Wangda ¹; (1.Institute of Eco-environmental Sciences, Jiaxing Academy of Agricultural Science, Jiaxing, Zhejiang 314016, China; 2.Haining Agricultural and Rural Bureau, Jiaxing, Zhejiang 314400, China; 3.Institute of Biotechnology Research, Jiaxing Academy of Agricultural Science, Jiaxing, Zhejiang 314016, China)

Keywords:: rice; total rice straw returning; nitrogen; plant growth; soil nutrient; carbon pool

CLC:: S147.2

DOI:: -

Abstract:: In order to determine the appropriate nitrogen application amount of single season late japonica rice under the full amount of rice straw returning to field in northern Zhejiang Province, the field experiment was carried out, and the random block group design was adopted. Four nitrogen application levels such as no nitrogen application(N₀), 165 kg/hm²(N_L), 240 kg/hm²(N_M), and 315 kg/hm²(N_H)were set according to the fertilization practice of local farmers. We investigated the effects of nitrogen application on the growth, soil nutrients and carbon pool of single-season late japonica rice in northern Zhejiang Province under the condition of full straw returning to field. The results showed that: rice tillering number, plant height, leaf area index, chlorophyll content and dry matter of aerial part weight under treatments of N_M and N_H were higher than other treatments; in terms of paddy under the straw returning full amount, the soil available phosphorus, available potassium of N_M significantly increased by 43.16%, 30.13%, 13.13% and 31.86%, 22.13%, 15.81%(p<0.05), respectively, compared with N₀, N_L and N_H treatments; the dissolved organic carbon and the soil microbial biomass organic carbon of N_M significantly increased by 88.47%, 13.99% and 37.10%, 15.39%(p<0.05), respectively, compared with N₀ and N_L treatment; in terms of yield, the highest yield was found in treatment N_M, which was 51.70%, 15.39% and 9.45% higher than N₀, N_L and N_H treatments, respectively. In conclusion, under the setting conditions of this experiment, pure nitrogen rate of 240 kg/hm² was the best nitrogen fertilizer regulation model for single-season late japonica rice in northern Zhejiang Province under the full straw returning to the field.

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Last Update: 2021-02-10