Quantitative analysis of growth in coffee plants cultivated with a water-retaining polymer in an irrigated system1

Souza, Antonio Jackson de Jesus; Guimarães, Rubens José; Colombo, Alberto; Sant’Ana, José Antonio do Vale; Castanheira, Dalyse Toledo

doi:10.5935/1806-6690.20160019

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Crop Science • Rev. Ciênc. Agron. 47 (1) • Mar 2016 • https://doi.org/10.5935/1806-6690.20160019 linkcopy

Quantitative analysis of growth in coffee plants cultivated with a water-retaining polymer in an irrigated system1¹

Análise quantitativa do crescimento de cafeeiros cultivados com polímero hidro retentor em sistema irrigado

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study aimed to evaluate the use of hydro polymer retainer in the quantitative growth of coffee plants at different levels of irrigation and soil types. The experiment was conducted in pots with seedlings bag in the greenhouse of the Setor de Cafeicultura, Universidade Federal de Lavras. The experimental design was in randomized blocks in factorial (2x4x2): absence or presence of hydro polymer retainer, four levels of irrigation (25%, 50%, 75% and 100%), two soil types (sandy soil and medium texture). At 150 days evaluated the stem diameter, plant height, leaf area, number of leaves, dry weight of shoots, plant dry mass, root dry weight, root dry weight ratio of shoot, leaf area ratio, absolute growth rate, relative growth rate, net assimilation rate and leaf area index. It was concluded that the polymer hydro retainer hydrated favored the growth of coffee plants and irrigation promoted greater growth of coffee in medium textured soil compared to soils with sandy texture.

Key words:
Soil types; Greenhouse; Coffea arabica L.; Hydrogel

SOIL	Clay	pH	P	K	Na	Ca	Mg	Al	H + Al	SB	(t)	(T)
Class	dag kg^-1	(H₂O)	----------mg dm^-3-----------			-------------cmol_c dm^-3--------------				-----cmol_c dm^-3-----
RQo*	5	5.2	7.9	67	-	0.2	0.1	0.6	4.5	0.4	1	5
LVAd**	26	5.3	0.6	39	-	0.1	0.1	0.1	2.9	0.3	0.4	3.2
(Continued)
SOIL	V		M		MO		Prem	Zn	Mn	Cu	B	S
Class	--------------------%--------------------				dag kg^-1		mg L^-1	----------------mg dm^-3--------------------
Rqo	9		57.5		1.6		38.3	0.5	3.0	0.4	0.1	6.7
LVAd	8.8		26.3		0.6		16.4	0.2	1.2	0.3	0.1	7.5

SV	GL	Mean Square
SV	GL	SD	PH	LA	NL	SDW	SDP
G	1	1.110	52.501*	48096.565	30.083	14.666*	26.150*
S	1	8.085**	164.280**	109143.067*	52.083	49.329**	89.480**
I	3	5.121**	577.002**	567649.742**	505.722**	78.990**	113.022**
B	2	0.623	51.193**	136568.394**	209.896**	44.798**	72.967**
GxS	1	0.001	1.141	317.387	1.7.10^-15	0.005	0.209
GxI	3	0.035	0.314	5979.623	32.139	0.617	1.858
IxS	3	1.675**	26.124*	24912.700	40.139	9.855*	13.468#
GxIxS	3	0.409	6.585	13541.764	13.500	2.117	4.332
Error	30	0.273	8.784	17629.793	21.607	3.085	4.869
CV %		11.15	8.88	22.22	24.04	24.92	25.52

SV	GL	Mean Square
SV	GL	RDW	RDW SH^-1	LAR	AGR	RGR	NAR	LAI
G	1	1.649	0.002	143.821	0.002*	0.3.10^-5**	6.3.10^-9	0.026
S	1	5.933**	0.032**	1647.544**	0.006**	0.6.10^-5**	3.5.10^-8**	0.075
I	3	3.660**	0.019**	419.952**	0.007**	0.1.10^-4**	2.2.10^-8**	0.590**
B	2	4.425**	0.026**	587.064**	0.004**	0.2.10^-5**	1.7.10^-8**	0.042
GxS	1	0.150	0.4. 10^-4	5.002	0.1.10^-5	4.3.10^-7	5.2.10-11	0.001
GxI	3	0.35	0.004	44.290	0.1. 10^-4	7.13.10^-7	3.8.10-10	0.037
IxS	3	0.355	0.002	159.372	0.001#	0.1.10^-5	4.8.10-9	0.021
GxIxS	3	0.662	0.007	142.267	0.3.10^-4	0.1.10^-5	1.4.10-9	0.088
Error	30	0.428	0.004	90.796	0.3.10^-4	0.1.10^-5	1.8.10-9	0.042
CV %		40.87	28.27	13.17	27.23	10.05	17.41	14.10

Polymer	SD	PH	LA	NL	SDW	PDW
No Gel	4.53 A	32.32 B	565.93 A	18.54 A	6.49 B	7.91 B
With Gel	4.84 A	34.41 A	629.24 A	20.12 A	7.60 A	9.39A

Polymer	RDW	RDW/SH	LAR	AGR	RGR	NAR	LAI
No Gel	1.41 A*	0.22 A	74.10 A	0.058 B	0.019 B	0.00023 A	1.43 A
With Gel	1.79 A	0.23 A	70.64 A	0.070 A	0.021 A	0.00025 A	1.48 A

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[TFN01] ^*
RQo - typic spodic Orthic Quartzarenic Neosol;

[TFN02] ^**
LVAd - typic dystrophic Red-Yellow Latosol; pH in water, KCl e CaCl₂ – Ratio 1:2,5 ; PNa - K- Fe - Zn- Mn- Cu- Extractant: Mehlich 1; Ca - Mg- Al- Extractant: KCl - 1 mol/L ; H+; Al- Extractant: SMP; SB= Sum of Exchangeable Bases; CEC (t) - Effective Cation Exchange Capacity; CTC (T) - Effective Cation Exchange Capacity at pH 7,0; V= Base Saturation Index; m= Aluminium Saturation Index; Organic Matter (OM) - Oxidation: Na₂Cr₂O₇ 4N+ H₂SO₄ 10N; P-rem: Remaining Phosphorous; B- Hot water extractant ; S – Extractant - Monocalcium phosphate in acetic acid

Quantitative analysis of growth in coffee plants cultivated with a water-retaining polymer in an irrigated system11

Análise quantitativa do crescimento de cafeeiros cultivados com polímero hidro retentor em sistema irrigado

ABSTRACT

Quantitative analysis of growth in coffee plants cultivated with a water-retaining polymer in an irrigated system1¹