-
Figure 1.
Relationship between mean daily root zone temperature (RZT) and black plastic film mulch degradation rating during the first 42 d after transplanting (DAT). Transplanting was on 24 Aug. Film degradation rating was evaluated visually on a scale of 0 to 5 (0 = 0% degradation; 1 = 1% to 5% degradation; 2 = 6% to 10% degradation; 3 = 11% to 20% degradation; 4 = 21% to 50% degradation; 5 = > 50% degradation). Tifton, GA, USA.
-
Figure 2.
Eggplant marketable yield as a function of the mean daily root zone temperature (RZT) under colored plastic mulches during the first 42 d after transplanting. Transplanting was on 24 Aug Tifton, GA, USA.
-
Mulch Mulch color 23 June 25 July 5 Aug 24 Aug 8 Sept 4566A Black 0.00 0.00 dz,y 0.5 f 0.25 e 0.75 f 4603M Black 0.00 0.25 cd 0.75 ef 0.75 cde 0.50 f 4603P Black 0.00 0.75 cd 0.75 ef 0.50 de 0.75 f 4603Q Black 0.00 1.00 c 0.75 ef 1.00 cd 1.75 def 4611J Black 0.00 0.50 cd 2.5 c 3.50 b 4.25 abc 4611L Black 0.00 2.00 b 4 b 4.50 a 5.00 a 4636A Black 0.00 0.25 cd 0.25 f 1.00 cd 2.75 cde 4636B Black 0.00 0.50cd 0.75 ef 0.50 de 1.75 def 4636C Black 0.00 0.50 cd 0.75 ef 0.75 cde 0.75 f 4637B Black 0.00 2.25 b 4.25 ab 4.75 a 4.75 ab 4637C Black 0.00 0.25 cd 0 f 0.75 cde 1.50 def 4637D Black 0.00 4.25 a 5 a 5.00 a 5.00 a 4637E Black 0.00 0.75 cd 2.25 cd 3.50 b 4.25 abc 4625A Transparent 0.00 5.00 a 5 a 5.00 a 5.00 a 4625D Transparent 0.00 0.75 cd 0.5 f 1.00 cd 3.00 bcd 4626C Transparent 0.00 0.00 d 0 f 0.50 de 0.50 f 4637A Transparent 0.00 0.75 cd 0.75 ef 0.50 de 1.00 ef 4636L White 0.00 1.00 c 1.75 cd 1.25 c 1.50 def 4636M White 0.00 0.00 d 0.75 ef 0.75 cde 0.75 f 4636N White 0.00 0.75 cd 1.5 de 1.00 cd 2.00 def p <0.0001 <0.0001 <0.0001 <0.0001 z Values that are followed by different letters in the same column are significantly different by Fischer's Protected Least Significant Difference test at p ≤ 0.05.
y Film degradation was evaluated visually on a scale of 0 to 5 (0 = 0% degradation; 1 = 1% to 5% degradation; 2 = 6% to 10% degradation; 3 = 11% to 20% degradation; 4 = 21% to 50% degradation; 5 = > 50% degradation).Table 1.
Visual degradation of plastic film mulches under field conditions during the eggplant growing season. Plastic film mulches varied in color and chemical composition (laid on 23 June 2005). Tifton, GA, USA.
-
Mulch film Film color Seasonal RZT
(°C)Early marketable (t/ha) Total marketable (t/ha) Fruit weight
(g)4566A Black 28.19 dz 4.02 cde 14.6 ab 373 abc 4603M Black 29.31 b 4.11 cde 16.7 ab 355 bc 4603P Black 28.27 d 4.62 bcde 16.4 ab 360 bc 4603Q Black 27.71 e 4.29 cde 15.2 ab 347 bc 4611J Black 27.73 e 5.07 bcd 15.3 ab 345 bc 4611L Black 25.97 i 4.20 cde 16.4 ab 346 bc 4636A Black 28.81 c 2.77 e 10.4 c 430 a 4636B Black 28.86 c 3.61 cde 14.5 abc 365 bc 4636C Black 27.60 e 4.84 bcde 14.7 abc 376 ab 4637B Black 26.79 g 4.58 bcde 12.8 bc 330 bc 4637C Black 28.65 c 4.39 cde 17.2 ab 352 bc 4637D Black 26.46 h 4.80 bcde 15.3 abc 352 bc 4637E Black 27.78 e 4.85 bcde 13.4 abc 325 bc 4625A Transparent 26.98 fg 4.30 cde 16.3 ab 327 bc 4625D Transparent 29.93 a 3.64 cde 14.1 abc 351 bc 4626C Transparent 29.24 b 3.12 de 14.7 abc 328 bc 4637A Transparent 29.27 b 2.86 de 17.0 ab 320 bc 4636L White 27.14 f 6.79 ab 16.5 abc 335 bc 4636M White 26.92 fg 7.50 a 17.5 a 341 bc 4636N White 26.36 h 5.52 abc 16.1 ab 313 c p <0.0001 0.018 0.0431 0.046 LSD 0.51 2.28 4.6 60 z Values that are followed by different letters in the same column are significantly different by Fischer's Protected Least Significant Difference test at p ≤ 0.05. Table 2.
Seasonal root zone temperature (RZT) and cumulative fruit yields of eggplant grown on various plastic film mulches. Tifton, GA, USA Fall of 2005.
Figures
(2)
Tables
(2)