Leaf Senescence, Root Morphology, and Seed Yield of Winter Oilseed Rape (Brassica napus L.) at Varying Plant Densities

Table 4

Root length, number of root tips, root surface area, and root volume per unit area (0.25 m³) for low plant density population (LPD) and high plant density population (HPD) in ZS 11 and ZYZ 12 at 7-day intervals after peak anthesis during the 2012-2013 and 2013-2014 growing seasons.

Year	Variety	Day after peak anthesis (DAPA)	Root length (m)		Root tips (×10^3)		Root surface area (m^2)		Root volume (dm^3)
			LPD	HPD	LPD	HPD	LPD	HPD	LPD	HPD
2012-2013	ZS 11	0
		7
		14
		21
		28
	ZYZ 12	0
		7
		14
		21
		28
2013-2014	ZS11	0
		7
		14
		21
		28
	ZYZ12	0
		7
		14
		21
		28
Year (Y)
Variety (V)
Year (Y) × variety (V)
Y × DAPA
V × DAPA
Y × V × DAPA

indicates statistical significance of the correlation coefficients at ; indicates statistical significance of the correlation coefficients at ; the mean values in a column with different letters indicate significant differences at between treatment groups according to Duncan’s multiple range test.