Seed Zone Properties and Crop Performance as Affected by Three No-Till Seeders for Permanent Raised Beds in Arid Northwest China

• Published in: Journal of Integrative Agriculture Vol. 11; no. 10; pp. 1654 - 1664
• Main Authors: HE, Jin, LI, Hong-wen, McHugh, Allen David, WANG, Qing-jie, LI, Hui, Rasaily, Rabi Gautam, Sarker, Khokan Kumer
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2012; Science Press; Beijing Key Laboratory of Optimized Design for Modern Agricultural Equipment/College of Engineering, China Agricultural University,Beijing 100083, P.R. China%National Center for Engineering in Agriculture, University of Southern Queensland, Toowoomba Queensland 4350, Australia; Elsevier
• Subjects: crop growth; no-till seeder; no-till seeder permanent raised beds crop growth seedbed yield; permanent raised beds; seedbed; yield; 三个代表; 中国西北地区; 作物; 免耕播种机; 土壤表面; 永久; 生长情况; 西北干旱区; permanent raised beds; seedbed; no-till seeder; crop growth; yield
• ISSN: 2095-3119; 2352-3425
• DOI: 10.1016/S2095-3119(12)60168-3

The no-till seeders of various soil opener configurations have been shown to produce various soil physical responses in relation to soil and climate conditions, thus affecting crop performance in permanent raised beds （PRB） systems. This is particularly important in arid Northwest China where large volumes of residue are retained on the soil surface after harvest. In Zhangye, Gansu Province, China, a field trial assessed the effects of three typical （powered-chopper, powered-cutter and powered-disc） PRB no-till seeders and one traditional seeder on soil disturbance, residue cover index, bulk density, fuel consumption, plant growth, and subsequent yield. In general, seedbed conditions and crop performance for PRB no- till seeders seeded plots were better than for traditional seeded plots. In PRB cropping system, the powered-chopper seeder decreased mean soil disturbance and increased residue cover index compared to powered-disc and -cutter seeders. However, the results indicated that soil bulk density was 2.3-4.8% higher, soil temperature was 0.2-0.6℃ lower, and spring wheat emergence was 3.2-4.7% less. This was attributed to greater levels of residue cover and firmer seedbeds. Spring maize and wheat performance in the powered-cutter and -disc treatments was better （non-significant） than powered- chopper treatment. So powered disc no-till seeder, which generally provided the best planting condition and the highest yield, appeared to be the suitable seeder in heavy residue cover conditions. Considering the precision requirements for soil disturbance and residue cover, the powered strip-chopping no-till seeder could be a suitable option for PRB cropping system in Northwest China. Although these results are preliminary, they are still valuable for the design and selection of no-till seeders for PRB cropping systems in arid Northwest China.