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Sugarcane variety tests conducted during ... by AREC, Belle Glade.
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Title: Sugarcane variety tests conducted during ... by AREC, Belle Glade.
Physical Description: Serial
Creation Date: 1973
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Source Institution: University of Florida
Holding Location: University of Florida
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Belle Glade AREC Research Report EV-1974-10 April 1974
Sugarcane Variety Tests Conducted During 1973-74 by AREC, Belle Glade

I' I Raymond L. Walker-

Introduction
TiUPnivirst7y of Florida's Sugarcane variety testing and selection project
(1).continued in 1973-74 in cooperation with the USDA Sugarcane Field Station,
?cated at Cana 4 i ji- aIlorida and the Florida Sugar Cane League, Inc. This
report'i~ tcbrfilfTe fE the harvest results of four replicated variety tests in
this project.
The plant-cane test reported is a cooperative test with A. Duda & Sons.
The three stubble tests reported are in cooperation with Talisman Sugar Corpora-
tion. For the three stubble tests data from other harvests, previously reported
(1), is also included.
One other first stubble test was scheduled for harvest but was abandoned
due to damage caused by a fire.

Experimental Procedure
The plant-cane test was harvested using the conventional system of hand
cutting and weighing all cane from each plot and also by the alternate method
of counting all stalks in each plot and using the average stalk weight from a
ten-stalk small mill sample to obtain a calculated cane weight per plot. Data
for the three stubble tests was obtained by use of the alternate method.
For all tests ten-stalk samples were taken at random from each plot and
the juice extracted with a three-roller mill which gave approximately 55%
extraction. Juice was analyzed for Brix and sucrose. Sugar per ton cane and
sugar per acre were calculated in accordance with the Winter-Carp-Geerlings
formula as simplified by Arceneaux (2). Variety correction factors (V.C.F.)
were used in the.calculations (3). Varieties for which no V.C.F. was available
were assigned a factor of 1.00, which is equal to CL 41-223 and C.P. 63-588.
Growth measurements were made in the plant-cane test every two weeks from
June 21, 1973 until October 10, 1973. By the end of September the cane had
fallen and was so tangled that growth measurements could not be made accurately.
For this reason the total average stalk length for each variety is shown in Table
1 as of September 28, 1973. The plant cane test is located in Field 47B-21 of
A. Duda and Sons.
The first-stubble test is located one mile north of the old Florida Sugar
Corporation mill. For the first-stubble test 10-stalk samples were taken and


I/ Associate in Agronomy, University of Florida, IFAS, Agricultural Research
and Education Center, Belle Glade, Florida 33430.








calculations made in December, January, and February. The average data for the
three test periods were used for the comparison in Table 2 under the 1/16/74 date.
The second stubble tests are located in Section 36, three miles south of
South Bay and three miles north of the old Florida Sugar Corp. mill.
Analysis of variance and Duncan's multiple range test were used to interpret
the data.
Results and Discussion
Plant cane. The results of the plant-cane test are shown in Table 1. Sugar per
acre was highest for C.P. 63-588, C.P. 69-1052, C.P. 69-1059 and C.P. 1061 regard-
less of harvest method. Varieties C.P. 63-588, C.P. 69-1059 and C.P. 1061 were
the highest in pounds of sugar per ton cane. Varieties C.P. 63-588, C.P. 69-1052
and C.P. 69-1059 were highest in tons of cane per acre regardless of harvest
method. C.P. 69-1061 rated equal to the aforementioned three in tons cane per acre
with the alternate method. Stalk count was highest for C.P. 63-588 and C.P. 69-
1056. Stalk length was greatest for C.P. 69-1052, C.P. 69-1059 and C.P. 69-1061.
First stubble. Harvest results for two crops are listed in Table 2. Variety C.P.
68-1145 produced the highest tons of cane and sugar per acre in both crops. The
difference between C.P. 68-1145 and the check variety C.P. 63-588 was statistically
significant at the 5% level for cane tonnage but not for sugar tonnage. Varieties
C.P. 68-1022 and C.P. 68-1067 in the plant crop and C.P. 68-1026, C.P. 68-1067 and
C.P. 68-1154 in the first-stubble crop also produced sugar tonnage as high as C.P.
63-588. When the production for plant and first-stubble are added, C.P. 68-1145
produced significantly more tons of cane per acre than C.P. 63-588; however, the
superior juice quality of C.P. 63-588 negated any gain in tons of sugar per acre.
C.P. 68-1067 equaled C.P. 63-588 in cane and sugar tonnage per acre.
Second stubble. In the test located three miles south of South Bay, only C.P.
66-1079 produced as well as the standard variety, C.P. 63-588, in tons of sugar
per acre over three crops (Table 3). This test suffered from weeds, rat damage and
harvest machines. In the test located three miles north of the old Florida Sugar
Corporation mill, C.P. 62-374 produced significantly more total tons of sugar per
acre, in the three-crop cycle, than any other variety in the test, including 63-588.
Summary
Harvest data for four sugarcane variety tests in the 1973-74 season, together
with previous harvest data, point to two new varieties in the '68 series and three
in the '69 series as likely candidates to release for commercial production in the
future. These are: C.P. 68-1067, C.P. 68-1145, C.P. 69-1052, C.P. 69-1059 and
C.P. 69-1061. These varieties are approximately equal to C.P. 63-588 in their
production potential.








Acknowledgement
The author wishes to express appreciation to: The Florida Sugar Cane League,
Inc., for the grant which helped support this program; A. Duda and Sons and the
Sugarcane Growers Cooperative of Florida for providing land, labor and maintenance
of the plant-cane test; and Talisman Sugar Corporation for providing the land and
maintaining the three stubble-cane tests.
References Cited
1. Walker, Ray L. and Charles E. Freeman. 1973. The Sugarcane Variety Research
Program at the Agricultural Research and Education Center, Belle Glade 1972-
73 Season. AREC Mimeo Report EV-1973-8.
2. Arceneaux, G. 1935. A simplified method of making theoretical sugar yield
calculations in accordance with the Winter-Carp-Geerlings formula. Int. Sugar
J. 37: 264-265.
3. Rice, Edwin R. Sugarcane Variety Tests in Florida 1972-73 Harvest Season.
USDA, ARS-S-23, August 1973 (p. 6).


EV-1974-10 250 copies









Table 1. Date of harvest, average number of stalks per plot, average stalk length, tons of cane per acre, pounds of
sugar per ton cane and tons of sugar per acre for nine varieties planted in the fall of 1972 and harvested
by both the conventional and alternate methods.


A. Duda & Sons Test 1 (Harvested 12/17-18/73)


Variety

Cl. 41-223

C.P. 63-588

C.P. 68-1158

C.-P. 69-1052

C.P. 69-1056

C.P. 69-1059

C.P. 69-1061

C.P. 69-1062

C.P. 69-1074


Average no.
stalks per
plot

525 c1

650 a

604 b

605 b

680 a

530 c

431 d

547 c

537 c


Average stalk
length, in

117 de

116 e

124 cde

138 ab

121 cde

145 a

133 abc

129 bcd

131 bcd


Tons of cane per acre
IVeighed Calculated

64.1 bcd-/ 50.0 c

73.2 a 61.5 a

60.8 cd 54.2 bc

74.0 a 65.5 a

65.9 bc 57.1 bc

68.9 ab 64.2 a

66.2 bc 60.1 ab

64.6 bcd 50.9 c

54.8 e 49.8 c


Lb sugar/
ton cane

216 c

246 ab

220 c

229 bc

233 b

254 a

255 a

219 c

231 bc


Tons sugar per acre
Weighed Calculated

6.91 bc 5.41 d

8.97 a 7.56 a

6.71 c 5.95 cd

8.48 a 7.51 ab

7.65 b 6.63 bc

8.74 a 8.15 a

8.45 a 7.65 a

7.08 bc 5.58 cd

6.34 c 5.77 cd


/- Comparable


means within a column followed by the same letter do not differ:significantly at the 5% level.








Table 2. Average number of stalks per plot, tons of cane per acre, sugar per ton cane, sugar per acre and total sugar
produced in two crops for varieties planted in the fall of 1971.

Yield of 96 sugar
Cane per acre Per ton cane Per acre Total for
Av. stalk Plant 1st stubble Total Plant 1st stubble Plant 1st stubble 2 crops
Variety count/plot tons 2 crops pounds tons tons
Test 83
3/20-21/731- 1/16/74 3/20-21/73 1/16/74 3/20-21/73 1/16/74
2ac- 6.89 ef 5.67 cdA/ 12.56 de
C1. 41-223 495 defg2/ 59.2 fg 46.7 3/ 105.9 de 234 cd 251 abc3 6.89 ef 5.67 cd3- 12.56 de
C.P. 63-485 493 defg 68.1 cde 49.6 bc 117.7 cd 218 de 230 de 7.42 def 5.82 bcd 13.24 de
C.P. 63-588 604 bc 76.7 bc 56.8 bc 133.5 b 243 bc 233 cde 9.32 ab 6.63 abc 15.84 ab
C.P. 65-357 728 a 64.9 defg 53.1 bc 118.0 cd 229 cd 224 e 7.45 cdef 5.94 bcd 13.38 de
C.P. 68-1020 497 def 67.3 cdef 46.6 c 113.9 cd 254 ab 243 bcd 8.19 bcd 5.69 cd 13.88 de
C.P. 68-1022 417 h. 66.1 def 36.7 d 102.8 e 263 a 265 a 8.68 abc 4.87 d 13.55 de
C.P. 68-1026 550 cd 69.3 cde 49.6 bc 118.9 cd 230 cd 252 ab 7.98 cde 6.23 abc 14.21 cd
C.P. 68-1031 454 efgh 55.9 g 49.0 c 104.9 de 228 cd 240 bcde 6.35 f 5.87 bcd 12.22 e
C.P. 68-1067 450 efgh 83.0 ab 55.0 bc 138.0 b 232 cd 234 bcde 9.63 a 6.44 abc 16.07 ab
C.P. 68-1115 475 efgh 73.8 cd 52.8 bc 126.6 bc 209 e 205 f 7.71 cde 5.43 cd 13.15 de
C.P. 68-1145 744 a 87.8 a 65.3 a 153.1 a 221 d 229 de 9.69 a 7.38 a 17.07 a
C.P. 68-1154 628 b 63.1 efg 58.0 ab 121.1 c 239 bc 240 bcde 7.56 cdef 7.00 ab 14.56 bc


1/ Indicated


date of harvest.


SComparable means within a column followed by the same letter do not differ significantly at the 5% level.

SAverage of three samples (December 3, January 17, February 20).






per ton cane and sugar per acre for varieties planted in the fall of 1970.1/


Cane per acre Yield of 960 sugar
per ton of cane per acre
1st 2nd 1st 2nd 1st 2nd. Total for
Variety Plant stubble stubble Plant stubble stubble Plant stubble stubble 3 crops

tons pounds tons

Test 76
12/15/71-2 1/24/73 12/18/73 12/15/71 1/24/73 12/18/73 12/15/71 1/24/73 12/18/73
C.P. 63-485 49.6 bY 45.6 b 32.5 bc 222 b 248 b 225 a 5.55 b 5.65 b 3.71 b 14.84 b
C.P. 63-588 62.9 a 36.6 c 38.9 b 250 a 267 a 238 a 7.90 a 4.89 b 4.65 a 17.41 a
C.P. 66-1079 65.8 a 55.2 a 46.9 a 225 b 229 c 210 b 7.40 a 6.33 a 4.93 a 18.67 a
C.P. 67-2001 38.4 c 25.3 d 19.0 d 156 c 157 d 139 c 3.00 c 1.97 d 1.27 c 6.14 d
C.P. 67-2006 47.9 b. 24.5 d 29.4 c 241 a 245 b 227 a 5.75 b 3.00 c 3.33 b 12.10 c

Test 78
1/17/72 4/3/73 11/9/73 1/17/72 4/3/73 11/9/73 1/17/72 4/3/73 11/9/73
C1. 41-223 51.7 b 35.2 cd 24.5 b 222 cd 270 a 195 b 5.75 d 4.75 c 2.41 c 12.88 d
C.P. 56-59 64.0 a 41.5 b 22.9 b 230 bc 253 ab 178 c 7.35 b 5.27 bc 2.34 c 14.95 c
C.P. 57-603 68.1 a 39.2 bc 25.1 b 211 d 242 b 197 b 7.20 b 4.73 c 2.24 c 14.15 cd
C.P. 62-374 71.8 a 49.8 a 35.2 ab 250 a 253 a 194 b 8.95 a 6.28 a 3.44 b 18.68 a
C.P. 63-306 50.7 b 29.2 d 23.5 b 242 ab 265 ab 228 a 6.10 cd 3.86 d 2.66 bc 12.53 d
C.P. 63-588 63.2 a 41.8 b 36.7 a 236 abc 277 a 237 a 7.45 b 5.77 ab 4.38 a 17.58 b
C.P. 66-1079 65.5 a 40.8 bc 28.0 b 206 d 242 b 204 b 6.75 bc 4.95 c 2.68 bc 14.36 cd
i / ..


-' Suffered


from weeds, rat damage and harvest machines.


SIndicates dates of harvest.

SComparable means within a column followed by the same letter do not differ significantly at the 5% level.


Table 3. Tons of cane per acre, sugar