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Table 6 The main effects of cultivation system, foliage time, and stress modulator type on some biochemical properties

From: The effect of time and type of stress moderators on yield and yield components of cotton on conventional and double-cropping systems under saline conditions

  Chlorophyll a Chlorophyll b Total chlorophyll Carotenoid Proline Na K Na/k
/(mg.g1 FW) /(μmol.g–1 FW) /(mg·g–1 DW)
Cultivation system
 Conventional 1.452 ± 0.09a 1.32 ± 0.15a 2.78 ± 0.53a 0.811 ± 0.03a 10.6 ± 2.3a 61.7 ± 8.6a 51.3 ± 5.1a 1.20 ± 0.05a
 Double-cropping 0.691 ± 0.05b 0.872 ± 0.07b 1.56 ± 0.48b 0.612 ± 0.02b 9.82 ± 2.0b 52.1 ± 4.7b 43.8 ± 5.2b 1.18 ± 0.04a
Foliage time
 Flowering 0.982 ± 0.67b 0.981 ± 0.08b 1.96 ± 0.27b 0.733 ± 0.04a 9.41 ± 1.9b 56.2 ± 5.4a 45.1 ± 10.4b 1.28 ± 0.04a
 Flowering + bolling 1.02 ± 0.08a 1.22 ± 0.11a 2.39 ± 0.34a 0.682 ± 0.03b 11.1 ± 2.8a 57.5 ± 5.26a 49.9 ± 3.9a 1.29 ± 0.06a
Modulator type
 Water control 0.581 ± 0.02c 0.572 ± 0.03c 1.15 ± 0.06d 0.391 ± 0.02d 7.45 ± 0.81c 74.2 ± 5.3a 42.1 ± 2.6b 1.71 ± 0.03a
 GB 1.15 ± 0.07b 1.03 ± 0.07b 2.18 ± 0.08c 0.711 ± 0.03c 10.8 ± 1.19b 58.3 ± 5.1b 48.9 ± 5.5a 1.31 ± 0.05b
 SA 1.21 ± 0.14b 1.31 ± 0.12ab 2.48 ± 0.11b 0.822 ± 0.02b 11.31 ± 1.17a 41.5 ± 6.1d 50.2 ± 5.8a 0.861 ± 0.03c
 SNP 1.38 ± 0.18a 1.49 ± 0.09a 2.87 ± 0.09a 0.911 ± 0.03a 11.33 ± 1.56a 53.58 ± 2.2c 48.8 ± 7.2a 1.18 ± 0.04b
  1. Similar letters within the same column denote insignificant differences based on FLSD level of 5% (Mean ± SD)