摘要
Storage root yield of sweetpotato was decreasing owing to continuous sweetpotato cropping, debasement of soil physical properties, increasing incidence of pest and disease. This study was conducted to evaluate the changes in physicochemical properties of the soil owing to subsoiling (subsoiling to 50 cm depth), and the effect on growth and yield of sweetpotato. The subsoiling treatments included subsoiling treated every year for two years, subsoiling in the first year, and no subsoiling control. The soil physical properties measured were bulk density, hardness, porosity, three phase. Bulk density, porosity, soild (%) of three phase were improved by subsoiling in topsoil and subsoil. Main vine length and vine yield in subsoiling soil were higher than those in no subsoiling soil, but those were not significantly different. Yield of marketable storage root in subsoiling soils treated every year for two years and treated in the first year was more increased 17% and 20% than no subsoiling soil, respectively. The number of marketable storage root per plant was also higher in subsoiling soils than no subsoiling soil, but it was not significantly different. Soluble solid contents and total free sugar contents of storage root of sweetpotato were not significantly different among the treatments. These results show that improving soil physical properties by subsoiling could promote high yield of marketable storage root in continuous sweetpotato cropping field.
摘要译文
由于连续的甘薯种植，土壤物理性质下降，病虫害发生率增加，甘薯贮藏根系产量下降。本研究旨在评估深松（深松至50厘米深度）土壤理化性质的变化，以及对甘薯生长和产量的影响。深松处理包括深松处理，每年处理两年，第一年深松处理，没有深松控制。测量的土壤物理性质是堆积密度，硬度，孔隙率，三相。通过在表土和底土中进行深松处理，改善了三相的体积密度，孔隙率，固体（％）。深松土壤主要藤长和藤蔓产量均高于无深松土壤，但差异不显着。在每年处理两年并在第一年处理的深松土壤中，可销售贮藏根的产量分别比没有深松土的增加了17％和20％。深松土壤中每株植物的可销售贮藏根数也高于没有深松土壤，但没有显着差异。甘薯贮藏根的可溶性固形物含量和总游离糖含量在处理间无显着差异。这些结果表明，通过深松改善土壤物理性质可以促进连续甘薯种植田的可销售贮藏根的高产。
Lee, Hyeong-Un; Chung, Mi-Nam; Han, Seon-Kyeong; Ahn, Seung-Hyun; Lee, Joon-Seol; Yang, Jung-Wook; Song, Yeon-Sang; Kim, Jae-Myung; Nam, Sang-Sik; Choi, In-Hu;. Effect of Subsoiling on Growth and Yield of Sweetpotato in Continuous Sweetpotato Cropping Field[J]. Korean Journal of Crop Science, 2015,60(1): 47-53