Effects of free-air CO2 enrichment (FACE) and nitrogen (N) supply on N uptake and utilization of indica and japonica cultivars (Oryza sativa L.)

Jiang, Qian; Zhang, Jishuang; Xu, Xi; Liu, Gang; Zhu, Jianguo

doi:10.1186/s13717-020-00238-5

Ecological Processes

Table 2 F-value and the results of three-way ANOVA (type III) testing the elevated [CO₂], cultivar, N fertilizer, and their interactions on biomass, N concentration, and NUE of rice crops at three growth stages

From: Effects of free-air CO₂ enrichment (FACE) and nitrogen (N) supply on N uptake and utilization of indica and japonica cultivars (Oryza sativa L.)

Growth stage	Treatments	Biomass					N concentrations					NUE
Growth stage	Treatments	Panicle	Leaf	Stem	Root	Whole plant	Panicle	Leaf	Stem	Root	Whole plant	Panicle	Leaf	Stem	Root	Whole plant
82 DAT	CO₂	0.6	0.2	3.8⁺	10.7^**	2.1	1.4	8.6^**	4.8^*	0.0	3.8⁺	0.8	9.1^**	2.1	0.1	8.2^**
	Cultivar	30.7^**	0.1	0.8	0.5	3.0⁺	0.9	19.0^**	0.0	0.5	0.0	0.9	25.4^**	1.9	0.4	4.6^*
	N	8.0^**	38.1^**	7.7^**	12.0^**	22.9^**	12.1^**	195.2^**	88.4^**	20.9^**	138.0^**	11.9^**	218.6^**	64.4^**	13.1^**	173.2^**
	CO₂ × cultivar	6.1^*	0.2	0.4	0.1	0.3	0.3	0.0	0.5	6.5^*	5.5^*	0.4	0.3	0.0	5.2^*	0.1
	CO₂ × N	0.5	0.1	0.0	4.1⁺	0.1	0.4	0.2	0.2	1.1	0.5	0.4	0.2	0.2	1.3	0.6
	Cultivar × N	1.1	0.5	0.2	0.1	0.0	0.0	0.2	4.1⁺	0.3	0.1	0.0	3.5⁺	4.3^*	0.7	2.7
	CO₂ × cultivar × N	0.3	0.9	4.8^*	0.1	2.8	2.7	4.0⁺	1.8	0.2	0.1	2.7	4.1⁺	0.8	0.1	1.4
99 DAT	CO₂	5.9^*	0.0	3.6⁺	6.8^*	5.7^*	9.5^**	19.5^**	7.5^*	5.2^*	5.5^*	15.3^**	39.4^**	19.8^**	5.4^*	22.0^**
	Cultivar	13.3^**	0.5	0.1	4.5^*	2.8	0.0	1.5	0.0	1.5	0.72	1.8	50.8^**	0.2	1.5	0.0
	N	1.0	58.3^**	13.2^**	1.6	13.5^**	100.0^**	229.5^**	59.6^**	32.5^**	51.5^**	141.9^**	510.5^**	176.7^**	36.2^**	208.2^**
	CO₂ × cultivar	1.7	0.0	1.6	0.4	0.1	0.1	0.0	0.2	0.7	0.0	0.3	0.4	0.2	0.9	1.1
	CO₂ × N	4.5^*	0.7	1.1	0.3	3.4⁺	0.1	1.3	1.4	0.7	0.4	2.1	5.0	2.5	0.1	0.6
	Cultivar × N	0.0	0.2	1.0	15.2^**	0.5	9.5^**	31.3^**	0.0	0.9	1.3	14.2^**	113.3^**	0.0	0.7	0.4
	CO₂ × cultivar × N	0.0	0.2	0.0	0.2	0.0	0.0	0.8	0.2	0.1	0.6	0.6	0.0	0.0	0.5	1.4
Maturity	CO₂	1.6	0.4	0.4	4.2⁺	1.1	18.3^**	10.9^**	11.9^**	9.6^**	16.3^**	23.4^**	13.9^**	21.7^**	7.9^**	27.5^**
	Cultivar	1.6	0.1	1.3	9.7^*	0.7	9.0^**	3.7⁺	1.4	0.1	1.9	3.6⁺	10.1^**	0.9	0.4	0.6
	N	4.4^*	169.9^**	16.4^**	1.6	16.0^**	109.2^**	67.3^**	42.9^**	59.7^**	77.6^**	133.6^**	116.9^**	171.3^**	83.7^**	161.1^**
	CO₂ × cultivar	0.5	0.1	0.0	0.2	0.2	2.7	0.2	1.2	0.0	1.3	1.4	0.2	0.0	0.4	0.4
	CO₂ × N	2.8	3.7⁺	1.4	0.5	2.7	0.1	2.5	7.9^**	6.5^*	2.5	3.6⁺	0.1	3.2⁺	2.7	0.0
	Cultivar × N	0.0	3.5⁺	3.8⁺	0.4	0.6	30.1^**	0.2	1.4	0.1	5.3^*	28.7^**	4.1⁺	0.5	0.5	6.4^*
	CO₂ × cultivar × N	2.6	0.9	2.3	0.3	2.4	4.5^*	0.2	2.1	1.9	2.3	1.9	0.4	2.5	2.8	1.6

⁺P < 0.1; ^*P < 0.05; ^**P < 0.01

Back to article page