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2 土壤紧实度对甘薯生长前期耕作层土壤温度的影响

Table 2 Effect of soil compaction on soil temperature in the early growth stage of sweet potato (°C)

年份 Year	土层深度 Depth of soil layer (cm)	处理 Treatment	栽后20 d 20 days after planting			栽后30 d 30 days after planting			栽后40 d 40 days after planting
年份 Year	土层深度 Depth of soil layer (cm)	处理 Treatment	最高温度 MAT	最低温度 MIT	日较差 DTR	最高温度 MAT	最低温度 MIT	日较差 DTR	最高温度 MAT	最低温度 MIT	日较差 DTR
2014	10	SS	34.3 a	17.8 b	16.5 a	39.8 a	19.8 a	20.0 a	33.4 a	25.2 a	8.2 a
		CK	34.1 a	18.8 b	15.3 a	37.9 a	20.6 a	17.3 a	32.9 a	25.4 a	7.5 a
		JS	33.0 a	19.9 a	13.1 b	34.5 b	21.1 a	13.4 b	33.3 a	25.7 a	7.6 a
	20	SS	28.8 a	18.8 b	10.0 a	31.6 a	21.6 b	11.0 a	30.9 a	25.9 a	5.0 a
		CK	28.0 a	19.9 ab	8.1 b	30.8 a	22.1 ab	8.7 b	30.9 a	26.1 a	4.8 a
		JS	26.9 a	21.0 a	5.9 c	27.7 a	22.9 a	4.8 c	30.2 a	26.5 a	3.7 b
2015	10	SS	35.3 a	17.4 b	17.9 a	39.0 a	19.4 a	19.7 a	34.3 a	24.4 a	9.9 a
		CK	34.8 a	18.4 ab	16.4 b	38.0 ab	19.9 a	18.2 a	33.0 a	24.7 a	8.3 b
		JS	33.5 a	19.2 a	14.3 c	35.5 b	21.4 a	14.1 b	34.3 a	25.5 a	8.8 b
	20	SS	29.5 a	20.5 b	9.0 a	31.3 a	21.5 b	9.8 a	30.0 a	26.6 a	3.5 a
		CK	28.8 a	22.1 ab	6.7 b	30.5 a	23.1 ab	7.5 b	30.0 a	26.5 a	3.5 a
		JS	27.5 a	23.3 a	4.25 c	29.5 a	24.3 a	5.3 c	30.5 a	27.1 a	3.5 a