Innovation of strip fertilization planting for rice straw crushing with back-throwing and interrow-laying

Yinyan Shi; Ye Jiang; Xiaochan Wang; Haiming Yu; Hui Liu; Jingbo Chen

doi:10.1186/s13007-022-00862-6

Innovation of strip fertilization planting for rice straw crushing with back-throwing and interrow-laying

Plant Methods. 2022 Mar 15;18(1):31. doi: 10.1186/s13007-022-00862-6.

Authors

Yinyan Shi¹, Ye Jiang¹, Xiaochan Wang², Haiming Yu¹, Hui Liu¹, Jingbo Chen³

Affiliations

¹ Department of Electrical Engineering, College of Engineering, Nanjing Agricultural University, Box 96, 40 Dianjiangtai Road, Pukou, Nanjing, 210031, China.
² Department of Electrical Engineering, College of Engineering, Nanjing Agricultural University, Box 96, 40 Dianjiangtai Road, Pukou, Nanjing, 210031, China. wangxiaochan@njau.edu.cn.
³ Kunshan Station for Agricultural Mechanization Technology Extension, Kunshan, 215300, China.

Abstract

Background: In order to improve the current situations in rice-wheat rotation region in the middle and lower reaches of the Yangtze River, such as large amount of rice straw, complex returning process, short-time stubble connection, high power consumption, poor smoothness and especially unstable performance, and further promote the resource utilization process of full straw returning in Jiangsu province, this study, combined with the agronomic requirements of wheat sowing in rice-stubble land, developed an innovation of strip fertilization planting for straw crushing with back-throwing and interrow-laying in full stubble fields.

Results: Structural design and theoretical analysis were carried out on key components such as straw crushing device, broken-straw control device, soil rotary-tillage device and power transmission device, etc., to determine the corresponding structure and operating performance parameters, and then the field performance and verification tests were completed on the uniformity of inter-row mulching-straw Y₁ and the variability of seed-band width Y₂. The results showed that the crushing spindle rotation-speed A had an extremely significant impact on Y₁, followed by the machine ground speed B. The conveying impeller rotation-speed C had an extremely significant effect on Y₂, also secondary to the machine ground speed B. And the superior combination of factor levels as A₂B₂C₂ was adopted through the comprehensive power energy consumption analysis. The verification test results indicated that under the optimized operation parameter combination, namely, when the crushing spindle rotation-speed A was 2100 r/min, the machine ground speed B was 0.8 m/s, and the conveying impeller rotation-speed C was 210 r/min, the mean value of inter-row straw uniformity Y₁ and seed-band width variation Y₂ were 90.85% and 10.73%, respectively, after machine operation.

Conclusion: It meets the requirements of operation quality and planting agronomy of relevant protective tillage machinery, and provides technical and equipment support for the research and development of similar straw crushing and no-tillage sowing.

Keywords: Clean-area planting; Compound operation; Inter-row stacking; Straw returning; Strip seeding.

Abstract

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