JIA-2019-11

2527 ZHOU Tian-mei et al. Journal of Integrative Agriculture 2019, 18(11): 2521–2533 4. Discussion Nursery seedling/stock quality is of great importance to vegetable production in the modern agricultural industry. However, production of healthy seedlings is challenging due to the lack of knowledge in systemic management 0 20 40 60 80 100 0.06 0.08 0.10 0.12 0.14 0.16 R/T G value (g d –1 ) TEP (MJ m –2 ) 0 20 40 60 80 100 TEP (MJ m –2 ) 0 20 40 60 80 100 TEP (MJ m –2 ) 0 20 40 60 80 100 TEP (MJ m –2 ) 0 20 40 60 80 100 TEP (MJ m –2 ) 0.000 0.005 0.010 0.015 0.020 –0.02 0.00 0.02 0.04 0.06 0.08 0.10 0.12 HI1 –0.02 0.00 0.02 0.04 0.06 0.08 0.10 HI2 –0.002 0.000 0.002 0.004 0.006 0.008 0.010 0.012 HI3 A B D E C R/T=0.0047e 0.0348TEP +0.0619 R 2 =0.7584, n =14 HI2=0.0296e 0.0184TEP –0.0408 R 2 =0.9423, n =14 G=0.0024e 0.0257TEP –0.0034 R 2 =0.9739, n =14 HI1=0.0009e 0.0308TEP –0.0015 R 2 =0.9772, n =14 HI3=0.0017e 0.0486TEP –0.0060 R 2 =0.9519, n =14 Fig. 2 Relationship between seedling healthy indexes and thermal effectiveness and photosynthetically active radiation ( TEP) in tomato seedlings. R/T refers to root-shoot ratio (eq. (4)); G value refers to the ratio of whole plant dry mass to age of seedling (eq. (5)); HI1, HI2 and HI3 are different seedling healthy indexes (eqs. (6)–(8)); R 2 refers to the correlation coefficient of simulated and observed values; n refers to sample size. 0 10 20 30 40 50 60 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16 A B D E C R/T TEP (MJ m –2 ) 0 10 20 30 40 50 60 TEP (MJ m –2 ) 0 10 20 30 40 50 60 TEP (MJ m –2 ) 0 10 20 30 40 50 60 TEP (MJ m –2 ) 0 10 20 30 40 50 60 TEP (MJ m –2 ) 0.000 0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.016 –0.002 0.000 0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.016 0.018 HI1 –0.02 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 HI2 HI3 0.00 0.02 0.04 0.06 0.08 0.10 G value (g d –1 ) R/T=0.0147e 0.0260TEP +0.0732 R 2 =0.7511, n =14 G=0.0016e 0.0383TEP –0.0010 R 2 =0.9595, n =14 HI2=0.0029e 0.0664TEP –0.0015 R 2 =0.9860, n =14 HI3=0.0014e 0.0694TEP –0.0023 R 2 =0.9710, n =14 HI1=0.0003e 0.0671TEP –0.0003 R 2 =0.9856, n =14 Fig. 3 Relationship between seedling healthy indexes and thermal effectiveness and photosynthetically active radiation (TEP) in cabbage seedlings. R/T refers to root shoot ratio (eq. (4)); G value refers to the ratio of whole plant dry mass to days of seedling (eq. (5)); HI1, HI2 and HI3 are different seedling healthy indexes (eqs. (6)–(8)); R 2 refers to the correlation coefficient of simulated and observed values; n refers to sample size.