Effect of Abiotic Stresses on the Nondestructive Estimation of Rice Leaf Nitrogen Concentration

Table 5

Descriptive statistics (mean, standard deviation, and coefficient of variation) for chlorophyll and leaf N concentration based on dry weight (Ch_dw and N_dw) dependent on sampling time (days after seeding: DAS), stress treatment, and variety used.

Sampling	Treatment	Variety	Chdw (mg g^−1)			Ndw (mg g^−1)
DAS			Mean	STDEV	CV	Mean	STDEV	CV
29	P−	Dular	8.7	0.3	3	37.0	0.0	0
50	P−	Dular	9.4	0.3	3	33.0	1.0	3
68	P−	Dular	7.3	0.6	8	28.7	1.2	4
29	P−	IR72	11.6	2.2	19	39.3	1.2	3
50	P−	IR72	8.9	1.7	19	32.0	1.0	3
68	P−	IR72	7.5	0.1	2	28.7	1.2	4
29	P+	Dular	7.6	1.2	16	38.7	0.6	1
50	P+	Dular	8.3	2.0	24	28.7	2.1	7
68	P+	Dular	5.3	0.7	14	17.5	2.1	12
29	P+	IR72	9.7	0.5	5	39.3	2.1	5
50	P+	IR72	8.4	0.9	10	26.7	2.1	8
68	P+	IR72	5.1	0.7	14	17.7	0.6	3
29	S−	IR72	10.7	0.9	8	36.3	1.5	4
50	S−	IR72	6.2	0.5	8	20.7	1.5	7
68	S−	IR72	4.0	0.3	8	18.0	0.0	0
29	S+	IR72	9.4	0.5	5	36.0	1.0	3
50	S+	IR72	5.6	0.3	5	19.7	0.6	3
68	S+	IR72	3.7	0.7	19	17.3	1.2	7
30	SAL−	IR65192	10.9	1.9	18	31.7	1.2	4
50	SAL−	IR65192	3.7	0.4	11	16.7	0.6	3
68	SAL−	IR65192	3.8	0.9	24	15.3	1.5	10
30	SAL−	IR72	12.2	1.6	13	35.0	2.6	8
50	SAL−	IR72	3.7	0.9	25	17.0	0.0	0
68	SAL−	IR72	3.9	0.9	22	16.3	1.5	9
30	SAL+	IR65192	10.1	0.6	6	34.0	0.0	0
50	SAL+	IR65192	5.4	1.1	20	19.7	2.1	11
68	SAL+	IR65192	3.9	0.5	13	19.0	1.0	5
30	SAL+	IR72	10.0	0.2	2	35.3	1.2	3
50	SAL+	IR72	4.7	0.4	10	21.7	0.6	3
68	SAL+	IR72	4.1	0.6	14	20.7	0.6	3
47	W−	IR72	10.4	1.1	10	39.1	0.4	1
57	W−	IR72	5.6	1.1	19	28.7	0.9	3
75	W−	IR72	6.4	0.9	13	26.7	0.3	1
85	W−	IR72	6.8	0.9	13	24.3	1.0	4
95	W−	IR72	5.7	0.7	12	17.6	0.2	1
47	W−	Swarna	12.2	1.3	11	40.0	1.5	4
57	W−	Swarna	7.0	0.2	2	28.1	3.3	12
75	W−	Swarna	7.5	0.7	10	22.3	1.9	9
85	W−	Swarna	5.8	0.5	9	20.5	2.0	10
95	W−	Swarna	5.1	1.0	19	20.0	1.4	7
47	W+	IR72	10.7	0.9	9	30.4	0.7	2
57	W+	IR72	7.9	0.7	9	29.1	0.9	3
75	W+	IR72	7.4	0.5	7	22.7	3.0	13
85	W+	IR72	6.6	0.6	8	24.7	1.0	4
95	W+	IR72	7.2	0.4	5	30.2	1.3	4
47	W+	Swarna	13.2	1.0	8	30.2	1.0	3
57	W+	Swarna	9.1	1.0	11	27.3	1.3	5
75	W+	Swarna	6.8	1.1	16	22.2	0.3	1
85	W+	Swarna	6.1	1.1	18	22.0	1.4	6
95	W+	Swarna	6.3	0.8	13	23.1	1.4	6