Production components of Jatropha under irrigation and nitrogen fertilization in the semiarid region of Ceará

Carvalho, Clayton M. de; Marinho, Albanise B.; Viana, Thales V. de A.; Valnir Júnior, Manoel; Silva, Leonaria L.; Gomes Filho, Raimundo R.

doi:10.1590/1807-1929/agriambi.v19n9p871-876

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Manejo de Solo, Água e Planta • Rev. bras. eng. agríc. ambient. 19 (9) • Sept 2015 • https://doi.org/10.1590/1807-1929/agriambi.v19n9p871-876 copy

Production components of Jatropha under irrigation and nitrogen fertilization in the semiarid region of Ceará

Componentes de produção do pinhão-manso sob irrigação e adubação nitrogenada no semiárido cearense

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Jatropha curcas L. proves to be a promising species, considering its inclusion in the National Program of Biodiesel Production and Use. However, since it has not been genetically improved, agronomic information is still scarce in the literature, especially under conditions of water and nutritional stress. Thus, this field study aimed to evaluate the effects of irrigation depths (735; 963; 1,191; 1,418 and 1,646 mm) and nitrogen fertilization (0; 25; 50 and 75 kg ha^-1) on the production of Jatropha plants. Plants under the highest irrigation depth showed the highest values of number of fruits and productivity of fruits, seeds and albumen. Plants under the irrigation depth of 1,191 mm showed the highest values of mean mass of albumen and the ratios between mass of albumen and mass of seeds and between mass of albumen and mass of fruits. Nitrogen fertilization did not influence the production components of Jatropha.

Key words:
Jatropha curcas L.; irrigation; biodiesel; productivity

Parameter	Unit	Layer (m)
Parameter	Unit	0-0.20
Hydro-physical
Coarse Sand	g kg^-1	615
Fine Sand	g kg^-1	307
Silt	g kg^-1	49
Clay	g kg^-1	29
Natural Clay	g kg^-1	17
Soil Bulk Density	kg dm^-3	1.54
Soil Particle Density	kg dm^-3	2.66
Total Porosity	%	41
Field Capacity^* * The water contents at field capacity and permanent wilting point were determined using the volumetric ring method at the potentials of -0.010 MPa and -1.5 MPa, respectively	%	13.24
Permanent Wilting Point^* * The water contents at field capacity and permanent wilting point were determined using the volumetric ring method at the potentials of -0.010 MPa and -1.5 MPa, respectively	%	5.27
Available Water Content	%	7.97
Textural Class		Sand
Chemical
Organic Matter	g kg^-1	5.17
Calcium	cmol_c dm^-3	1.40
Magnesium	cmol_c dm^-3	1.40
Calcium + Magnesium	cmol_c dm^-3	2.80
Aluminum	cmol_c dm^-3	1.00
Potassium	mg dm^-3	31.00
Phosphorus	mg dm^-3	5.00
Sodium	mg dm^-3	3.00
pH		4.50

Source of variation	DF	Mean square
		NF (fruit plant^-1)	MMF	MMS	MMA
		NF (fruit plant^-1)	(g)
Irrigation depths (L)	4	2,506.07940^ Significant at 0.01 and (*) at 0.05 probability level;	0.00749^ns ns not significant at 0.05 probability level by F test	0.00092^ns ns not significant at 0.05 probability level by F test	0.07301^ Significant at 0.01 and (*) at 0.05 probability level;
Nitrogen levels (N)	3	186.84959^ns ns not significant at 0.05 probability level by F test	0.00837^ns ns not significant at 0.05 probability level by F test	0.00070^ns ns not significant at 0.05 probability level by F test	0.00294^ns ns not significant at 0.05 probability level by F test
Interaction L x N	12	136.27668^ns ns not significant at 0.05 probability level by F test	0.00783^ns ns not significant at 0.05 probability level by F test	0.00112^ns ns not significant at 0.05 probability level by F test	0.00273^ns ns not significant at 0.05 probability level by F test
Block	2	28.87848^ns ns not significant at 0.05 probability level by F test	0.00281^ns ns not significant at 0.05 probability level by F test	0.00331^ Significant at 0.01 and (*) at 0.05 probability level;	0.00038^ns ns not significant at 0.05 probability level by F test
Residue (L)	8	160.33671	0.00707	0.00032	0.00280
Residue (N)	30	134.22718	0.00637	0.00084	0.00254
CV (L)	(%)	21.02	2.86	2.44	10.82
CV (N)	(%)	19.23	2.71	3.95	10.30

Source of variation	DF	Mean square
		PRODFH	PRODSH	PRODAH
		(kg ha^-1)
Irrigation depths (L)	4	56,055.51888^ Significant at 0.01 and (*) at 0.05 probability level;	23,805.20461^ Significant at 0.01 and (*) at 0.05 probability level;	9,022.63740^ Significant at 0.01 and (*) at 0.05 probability level;
Nitrogen levels (N)	3	5,067.74366^ns ns Not significant at 0.05 probability level by F test	2,269.45446^ns ns Not significant at 0.05 probability level by F test	963.25549^ns ns Not significant at 0.05 probability level by F test
Interaction L x N	12	3,191.78384^ns ns Not significant at 0.05 probability level by F test	1,340.62244^ns ns Not significant at 0.05 probability level by F test	541.61765^ns ns Not significant at 0.05 probability level by F test
Block	2	1,026.86621^ns ns Not significant at 0.05 probability level by F test	464.63013^ns ns Not significant at 0.05 probability level by F test	230.70339^ns ns Not significant at 0.05 probability level by F test
Residue (L)	8	4,532.74532	2,040.26713	777.66346
Residue (N)	30	5,067.74366	1,431.19018	567.21862
CV (L)	(%)	22.79	23.62	23.66
CV (N)	(%)	19.51	19.79	20.21

Source of variation	DF	Mean square
		RMAMS	RMAMF
		(%)
Irrigation depths (L)	4	8.51691^* ** Significant at 0.01 and (*) at 0.05 probability level;	581.51416^ Significant at 0.01 and (*) at 0.05 probability level;
Nitrogen levels (N)	3	1.26892^ns ns Not significant at 0.05 probability level by F test	31.09032^ns ns Not significant at 0.05 probability level by F test
Interaction L x N	12	3.11378^ns ns Not significant at 0.05 probability level by F test	16.41360^ns ns Not significant at 0.05 probability level by F test
Block	2	4.16100^ns ns Not significant at 0.05 probability level by F test	18.18517^ns ns Not significant at 0.05 probability level by F test
Residue (L)	8	1.84390	22.71998
Residue (N)	30	1.84662	21.03965
CV (L)	(%)	2.20	11.05
CV (N)	(%)	2.21	10.64

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[1] carvalho_cmc@yahoo.com.br (Autor correspondente)