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Table 5 Residues and apparent balance of phosphorus in paddy soil

From: Effects of no-till and rice varieties on nitrogen and phosphorus balance in rice fields

TimeBulk densitySoil phosphorus storagePhosphate fertilizerPhosphorus storageBRPSoil phosphorus storageBTP
SoilGrainStraw
g cm−3kg P ha−1
2016.06–2017.06
 NTJ1.2152400.6 ± 4442410.7 ± 22a14.96 ± 0.4a8.70 ± 0.7ab10.22 ± 1.8c2413.2 ± 4.2a7.78 ± 2.1b
 NTG2405.8 ± 14ab14.99 ± 0.5ab10.12 ± 0.6a13.65 ± 0.4b2408.3 ± 5.1a11.21 ± 2.6ab
 CTJ2406.3 ± 19ab15.37 ± 0.6a7.92 ± 0.9b15.00 ± 2.3b2409.2 ± 4.3a12.11 ± 3.5a
 CTG2401.4 ± 8b14.20 ± 0.2b8.75 ± 0.6ab20.22 ± 1.9a2403.9 ± 7.5a17.78 ± 3.2a
2017.06–2018.06
 NTJ1.2212413.2 ± 4.2a442427.7 ± 6a15.76 ± 0.2a9.00 ± 0.4ab4.71 ± 0.3c2428.5 ± 1.5a3.83 ± 0.5b
 NTG1.2222408.3 ± 5.1a2420.7 ± 11ab15.63 ± 0.3ab10.58 ± 1.0a5.38 ± 1.3bc2422.1 ± 2.4b4.01 ± 0.7b
 CTJ1.2192409.2 ± 4.3a2417.6 ± 12ab15.99 ± 0.2a8.37 ± 1.3b11.20 ± 1.5b2421.0 ± 2.2b7.89 ± 1.3a
 CTG1.2202403.9 ± 7.5a2410.4 ± 9b14.83 ± 0.3b9.17 ± 0.8ab13.52 ± 0.8a2412.0 ± 3.7c11.85 ± 1.6a
  1. NTJ, NTG, CTJ, CTG indicate no-till/japonica rice, no-till/glutinous rice, conventional tillage/japonica rice, conventional tillage/glutinous rice, respectively. Different lowercase letters in each column indicate significant differences set at p = 0.05 level. End of rice season: October 2016 and October 2017. End of winter fallow season: June 2017 and June 2018. BRP: environmental loss of phosphorus in rice season; BTP: annual environmental loss of phosphorus