甘薯块根形成和膨大对土壤紧实度的响应机制及与产量的关系

史文卿,张彬彬,柳洪鹃,赵庆鑫,史春余,王新建,司成成

Response mechanism of sweet potato storage root formation and bulking to soil compaction and its relationship with yield

Wen-Qing SHI,Bin-Bin ZHANG,Hong-Juan LIU,Qing-Xin ZHAO,Chun-Yu SHI,Xin-Jian WANG,Cheng-Cheng SI

表3 块根产量及收获指数

Table 3 Storage root yield and harvest index

年份 Year 品种 Variety 处理 Treatment 块根产量 Root tuber yield (t hm-2) 生物产量 Biomass (t hm-2) 单株结薯数 Storage root (lump plant-1) 单薯重 Fresh weight (g lump-1) 收获指数 Harvest index 2014 北京553 Beijing 553 SS 36.22 a 58.24 a 2.65 a 284.70 a 0.62 a CK 29.15 b 56.72 a 2.53 a 238.30 b 0.51 b JS 18.62 c 46.86 b 2.11 b 173.35 c 0.40 c 龙薯9号 Longshu 9 SS 53.95 a 73.54 a 2.99 a 360.69 a 0.73 a CK 42.22 b 71.82 a 2.83 a 308.24 b 0.59 b JS 20.17 c 54.60 b 2.39 b 175.50 c 0.37 c 2015 北京553 Beijing 553 SS 38.98 a 65.42 a 2.68 a 302.43 a 0.60 a CK 32.48 b 65.25 a 2.66 a 254.77 b 0.50 b JS 21.60 c 57.77 b 2.29 b 196.72 c 0.37 c 龙薯9号 Longshu 9 SS 57.90 a 85.62 a 2.97 a 406.31 a 0.68 a CK 47.60 b 83.52 a 3.07 a 322.50 b 0.57 b JS 19.75 c 41.64 b 2.77 b 148.38 c 0.47 c