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1 主要生长时期土壤物理性状

Table 1 Soil physical properties in main growing period

年份 Year	栽后天数 Days after planting (d)	处理 Treatment	土层深度 Depth of soil layer (cm)	土壤紧实度 Soil compaction (kPa)	容重 Bulk density (g cm^-3)	总孔隙度 Bulk porosity (%)	毛管孔隙度 Capillary porosity (%)	非毛管孔隙度Non-capillary porosity (%)
2014	0	SS	5-10	251.33 e	1.25 c	52.29 a	32.71 c	19.58 a
		SS	15-20	264.22 de	1.28 bc	51.46 a	34.31 bc	17.15 b
		CK	5-10	384.00 c	1.30 bc	50.89 ab	38.13 ab	12.76 d
		CK	15-20	405.44 c	1.31 bc	50.67 ab	38.68 ab	11.99 d
		JS	5-10	833.22 b	1.40 a	47.49 b	39.04 ab	8.45 g
		JS	15-20	1085.00 a	1.42 a	46.66 b	39.69 a	6.97 h
	160	SS	5-10	267.93 de	1.26 c	52.07 a	35.71 bc	16.36 b
		SS	15-20	287.86 d	1.29 bc	51.16 a	36.37 b	14.79 c
		CK	5-10	403.33 c	1.32 ab	50.50 ab	39.52 ab	10.98 e
		CK	15-20	432.11 c	1.33 ab	50.01 ab	40.68 a	9.33 f
		JS	5-10	865.56 b	1.42 a	46.82 b	41.40 a	5.42 i
		JS	15-20	1125.00 a	1.43 a	46.41 b	41.69 a	4.72 j
2015	0	SS	5-10	261.00 d	1.25 c	51.17 ab	30.98 c	20.19 a
		SS	15-20	271.47 d	1.27 bc	51.68 ab	32.49 c	19.19 a
		CK	5-10	402.17 c	1.25 c	52.83 a	34.68 bc	18.15 b
		CK	15-20	416.40 c	1.30 b	51.90 a	36.96 ab	14.94 c
		JS	5-10	876.28 b	1.39 ab	47.11 b	37.64 ab	9.47 e
		JS	15-20	1130.00 a	1.43 a	47.21 b	38.23 ab	8.99 e
	160	SS	5-10	277.72 d	1.26 c	51.40 ab	34.98 bc	16.42 c
		SS	15-20	289.67 d	1.28 bc	51.87 a	36.15 b	15.71 c
		CK	5-10	421.56 c	1.27 bc	51.98 a	36.43 b	15.56 c
		CK	15-20	430.07 c	1.31 b	50.99 ab	39.96 a	11.03 d
		JS	5-10	901.83 b	1.42 ab	46.99 b	39.39 a	7.60 f
		JS	15-20	1190.44 a	1.44 a	47.17 b	39.73 a	7.45 f