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[1]LI Hongyu,ZHANG Gongliang,ZHENG Guiping,et al.Evaluation on Technical Effect of Double Depth Ridge Cultivation Mode of Rice in Cold Region[J].Research of Soil and Water Conservation,2020,27(04):164-170.

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Evaluation on Technical Effect of Double Depth Ridge Cultivation Mode of Rice in Cold Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 27 Number of periods: 2020 04 Page number: 164-170 Column: 目次 Public date: 2020-06-20

Title:: Evaluation on Technical Effect of Double Depth Ridge Cultivation Mode of Rice in Cold Region

Author(s):: LI Hongyu^1,2, ZHANG Gongliang¹, ZHENG Guiping^1,2, CHEN Liqiang¹, LÜ Yandong^1,2; (1.College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China; 2.Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China)

Keywords:: rice in cold region; double depth ridge cultivation; nitrogen utilization efficiency; yield; dry matter accumulation

CLC:: S511

DOI:: -

Abstract:: In order to evaluate the effects of double depth ridge cultivation on soil physicochemical indexes, rice yield and fertilizer utilization efficiency, the yield, dry matter production, root characters, fertilizer utilization efficiency, soil bulk density, aggregates and temperature of double depth ridge cultivation(short for ridge cultivation)were compared with those of the conventional flatten cultivation(short for flatten cultivation)in three experimental sites. The results indicated that the decrease of soil bulk density and the increase of soil temperature and aggregates were common phenomena under ridge cultivation; the bulk densities of 0—5 cm and 5—10 cm soil layers decreased by 10.40% and 10.26%, repectively, and the aggregates of 0—10 cm and 10—20 cm soil layers increased by 27.85% and 14.18%, respectively; from the first ten days of June to the first ten days of September, the average temperatures of 5 cm, 10 cm and 15 cm interval from surface soil increased by 2.35℃, 0.58℃ and 1.12℃, respectively; the dry matter production and leaf area index at full heading and filling stages, and root dry weight at each stage of ridge cultivation showed the significant advantageous values; The yield increased by 7.85% on average, with the range from 7.92% to 9.86%; the increase of panicle number or grain number per panicle was the main reason for the yield increase; compared with flatten cultivation, the nitrogen fertilizer contribution rate, soil nitrogen dependency rate, nitrogen fertilizer agronomic utilization rate and nitrogen partial productivity of ridge cultivation increased by 13.85%,15.46%,20.86% and 6.97%, respectively. Therefore, the double depth ridge cultivation can improve the physicochemical properties of soil and promote the growth and development of root system, which promote the growth advantage of aerial part and increase the fertilizer utilization rate and rice yield.

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Last Update: 2020-07-09