URC1-6


	[an error occurred while processing this directive]


	Table 1. Outline for tall fescue ET rate study


*Objective:*

*Cultivars:*

*Location:*

	*Growth Assembly:*

		*Field Lysimeter Plot:*

		*Experimental Design:*

			*Fertilization:*

				*Mowing:*


	To identify morphological characteristics of tall fescue cultivars associated with evapotranspiration rates when assessed under well-watered, field conditions.

	Amigo, Bonsai, Falcon, Shortcut, Monarch, RF 1, and Tomahawk.

	Glasshouse 30, Turf Field Laboratory for establishment; moved to field (12E, block 7) for ET rate measurements.

	Black plastic pots 25-cm (10-inch) diameter, 30-cm (12-inch) deep. Approximate volume: 14.7 liter (0.55 ft3). Bottom sealed with organdy cloth; pots filled with 8500 g fine fritted clay, packed and settled, and thoroughly rinsed. Lysimeters seeded at a rate of 8 lb seed 1000 ft2 (2 g seed per pot). Seed was mixed with 200 ml (approximately 725 g) fine fritted clay and spread evenly over pot surface. Seed was covered with an additional 200 ml fritted clay.

	A plot of tall fescue was used to house lysimeters. When lysimeters were placed within the sunken lysimeter sleeve, the turfgrass canopy of the lysimeter was the same height and contiguous with the turfgrass canopy of the surrounding field plot of tall fescue.

	Randomized complete block design, 5 replications.

	All turfs fertilized weekly with a nutrient solution (20 N-20 P2O5-20 K2O plus micronutrients) at 2.44 g N/m2 (0.5 lb N/1000ft2) per month. (Lysimeters were established at 1 lb N/1000 ft2 per month.) Pots were leached weekly prior to fertilization with RO water to prevent salt buildup.

	Mowed weekly with a glasshouse reel mower (7-blade reel) at a 50-mm (2-inch) cutting height. Mower has ability to collect clippings for yield.


	Table 2. Time Frame for Tall Fescue ET-rate Study


				*Activity*

	Lysimeter seeding

	Establishment in glasshouse

	Field plot seeding and establishment

	Weekly fertilizer regime initiated

	Lysimeters moved to field plot for acclimation

	ET Trial A

	ET Trial B

	ET Trial C

	ET Trial D


	*Date*

Jan. 3 - Feb. 14

Feb. 14 - Aug. 22

Feb. 16 - Aug. 22

Aug. 3

Aug. 5

Aug. 23 - Aug. 26

Aug. 30 - Sept. 2

Sept. 6 - Sept. 9

Sept. 20 - Sept. 23


	Table 3. Activity schedule for a typical ET-rate trial.


	*Day*

	Sun

	Mon

	Tues

	Wed

	Thurs

	Fri

	Sat


*Activity*

Plot irrigation (AM)

Plot irrigation (AM)


	*Data*

Saturate and fertilize lysimeters, drain, weigh


Weigh

Weigh

Weigh, mow, measure leaves

Plot irrigation (AM)


	ET1

	ET2

	ET3, yield, leaf extension rate


	*Day*

		F

		S

		S

		M

		T

		W

		T

		F

		S

		S

		M

		T

		W

		TR

		F

		S

		S

		M

		T

		W

		T


*Date*

	Aug 19

	20

	21

	22

	23

	24

	25

	26

	27

	28

	29

	30

	31

	Sept. 01

	02

	03

	04

	05

	06

	07

	08

Table 4. Tall fescue ET-rate schedule.

Activity

Pots mowed, plot mowed, initial LER measurements (initial)

Plot irrigate (42 min)

Saturate pots, fertilize, drain,weigh

Weigh TRIAL 1

Weigh

LER, weigh, mow plot, mow pots (clipping yield), LER (initial)

Plot irrigate (42 min)

Saturate pots, fertilize, drain, weigh

Weigh TRIAL 2

Weigh

LER, weigh, mow plot, mow pots (clipping yield), LER (initial)

Plot irrigate (42 min)

Saturate pots, ferilize, drain, weigh

Weigh TRIAL 3

Weigh


	F


	09


	LER, weigh, mow & fertilize plot, mow pots, clipping yield LER (initial)


	S

	S

	M

	T

	W

	T


	10

	11

	12

	13

	14

	15


	Plot irrigate (42 min)

	Plot irrigate (42 min)

	Plot irrigate (42 min)

	Saturate pots, fertilize

	Leaf density measurements

	Leaf density measurements


	F


	16


	Leaf length and width measurements, mow plot and pots


	S

	S

	M

	T

	W

	T

	F


	17

	18

	19

	20

	21

	22

	23


	Plot irrigate (42 min)

	Plot irrigate (42 min)

	Plot irrigate (42 min)

	Saturate pots, fertilize, drain, weigh

	Weigh TRIAL 4

	Weigh

	LER, weigh, mow plot, mow pots (clipping yield)


	LER =Leaf extension rate.(See Table 6 for details.)

* ** ***Significant at P=0.05, 0.01, and 0.001, respectively. The 0.001 significance level is greater than the 0.01 significance level which is greater that the 0.05 significance level. Correlation coefficients not followed by (*) are not significant. A(+) correlation indicates that as one variable increases the second variable increases or as one variable decreases the second variable also decreases. A(-) correlation indicates that as one variable increases or decreases the second variable does the opposite.

^ZThe correlation coefficient between the ET rate and clipping yield was -0.04, and was not significant.



	Back


	[Home] [Products] [Dealers] [Installation] [Lawn Care] [eStore]


	To order, visit an Authorized Nursery Near You or call 1-800-532-3489 Available only from Southland Sod Farms



	Next