Table 4. Analyses of Chlorophyll Density, Number of Leaves, Plant Height, and Variance of Rape Plants Subjected to Different Nitrogen Treatments^a.

	chlorophyll density (SPAD value)			number of leaves per plant			plant height (cm)
treatmentb	July 2	July 10	July 18	July 2	July 10	July 18	July 2	July 10	July 18
control	40.97d	33.17b	35.73d	6.00a	6.83c	7.00d	10.00d	15.97d	23.20b
UREA100%	44.57c	38.23a	40.97abc	7.00a	8.33b	9.00bc	11.03bc	18.13c	23.70b
UREA80%	45.33c	39.40a	43.60a	7.00a	8.67b	8.83c	11.40ab	17.77c	22.70b
SSNF100%	49.43a	39.97a	39.47bc	6.50a	9.33ab	10.33ab	10.13cd	21.23a	25.17a
SSNF80%	47.30b	38.87a	37.93cd	7.00a	9.00ab	10.00abc	11.00bc	20.10ab	23.83b
BBW100%	43.90c	40.03a	41.90ab	6.33a	10.00a	11.33a	10.17cd	17.77c	23.67b
BBW80%	45.23c	41.00a	39.00bc	7.00a	9.00ab	10.00abc	12.07a	19.00bc	23.17b

^aMeans within a column followed by different letters were significantly different based on analyses by one-way ANOVAs followed by Duncan tests for mean separation (p < 0.05).

^bControl (no fertilizer added), UREA100% or UREA80% (100 or 80% portions for urea), SSNF100% or SSNF80% (100 or 80% portions for water-soluble, slow-release nitrogen fertilizer), BBW100% or BBW80% (100 or 80% portions for a mixture of 70% SSNF and 30% urea).