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

Table 1

Average grain weight, straw weight, and panicle number at maturity for all treatments and all varieties used in the greenhouse experiment, including results of the analysis of variance conducted separately for each stress treatment.

Variety	Treatment^(b)	Grain; weight	Straw; weight	Panicle; number
		(g per pot)	(g per pot)	(per pot)
IR72	+W	48.5	69.5	30.7
IR72	–W	65.1	91.9	39.7
Mahsuri	+W	46.8	207.4	28.1
Mahsuri	–W	60.6	217.2	34.4
PSBRc9	+W	45.4	64.0	17.3
PSBRc9	–W	67.0	91.8	23.1
Swarna	+W	52.9	87.5	27.7
Swarna	–W	87.6	117.6	38.6
Treatment (a)		∗∗∗	∗∗∗	∗∗∗
Variety		∗	∗∗∗	∗∗∗
T×V		ns	ns	ns
IR65192-4B-10-3	–Sal	61.2 b	132.9 a	16.2 a
IR65192-4B-10-3	+Sal	1.2 d	90.1 c	5.0 c
IR72	–Sal	71.0 a	113.5 b	15.5 a
IR72	+Sal	12.5 c	82.9 c	11.1 b
Treatment (a)		∗∗∗	∗∗	∗∗∗
Variety		∗∗∗	ns	Ns
T×V		Ns	ns	Ns
IR72	+S	18.9 ns	31.2 a	13.3 ns
IR72	–S	19.3 ns	28.7 b	12.5 ns
Treatment (a)		ns	∗	ns
Dular	+P	18.4	23.2	9.7
Dular	–P	14.3	16.4	8.5
IR72	+P	21.6	26.1	14.0
IR72	–P	14.6	15.3	11.4
Treatment (a)		∗∗∗	∗∗∗	∗∗
Variety		ns	ns	Ns
T×V		ns	⋆⋆	Ns

(a) Significance levels indicated for the ANOVA are ns: 𝑃>.05; ∗: .05≤𝑃≤.01; ∗∗: .01≤𝑃≤.001; ∗∗∗: 𝑃<.001.
(b)Note that the nonstressed control treatments are indicated by +W, +S, and +P, but by –Sal.