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- W2384296031 abstract "【Objectives 】In drip irrigation agriculture system, according to phosphorus nutrition demand characteristic of maize in different growth stage,water coupling with P fertilizer application is an effective way of improving P resources efficiency as well as decreasing soil P fixation in calcareous soil. However,more information is needed about how to improve P utilization efficiency in drip irrigated fields. The objective of this field study was to compare the effect of different P fertilizers on drip-irrigated corn yield and P utilization. 【Methods】The experiment included four treatments:( i) no P fertilizer( CK),( ii) P2O581 kg /ha of solid diammonium phosphate( DAP) fertilizer basal applied at planting and 54 kg topdressed( T1),( iii) P2O581 kg /ha of liquid phosphoric acid( PA) fertilizer applied at planting and 54 kg topdressied( T2),( iv) P2O5135 kg /ha of liquid PA topdressed( T3).【Results】The yield was 20622 kg/ha in the T3 treatment,37% higher than in the CK,25%higher than in the T1,and 10% higher than in the T2 treatment. The total biomass,grain number per panicle and grain weight per 1000 grains were also the highest in the T3treatment( P 0. 05). At tasseling stage,14. 0 kg /haof P was absorbed in the CK treatment,22. 7 kg in the T1 treatment,21. 0 kg in the T2 treatment and 18. 3 kg in the T3 treatment. At maturity,total P absorption was 68. 4 kg /ha,77. 8 kg /ha,. 87. 2 kg /ha and 91. 9 kg /ha for CK,T1,T2,and T3,respectively. The amount of P absorption in the T3 treatment was significantly higher than in the other treatments( P 0. 05),indicating that topdressing of P significantly improved the P nutrition of corn. The apparent recovery efficiency of the P fertilizer( REP) was 16. 6% in the T1 treatment,32. 6% in the T2 treatment and 40. 6% in the T3 treatment. The T3 treatment increased REP by 8- 24 percentage points compared with the T1 and T2treatments. The agronomic efficiency of the P fertilizer( AEP) for T1,T2 and T3 was 7. 9,22. 7 and 40. 6kg /kg respectively. The T3 treatment increased AEP by 17. 9- 32. 7 kg /kg compared with the T1 and T2treatments.【Results】Liquid P fertilizer topdressing with drip irrigation significantly improves the P nutrition and P fertilizer utilization efficiency of corn,can be regarded as an efficient P fertilizer application strategy in calcareous soil." @default.
- W2384296031 created "2016-06-24" @default.
- W2384296031 creator A5064331352 @default.
- W2384296031 date "2014-01-01" @default.
- W2384296031 modified "2023-09-25" @default.
- W2384296031 title "Effect of water and P fertilizer coupling on corn yield,P uptake,and P utilization efficiency with drip irrigation in a calcareous soil" @default.
- W2384296031 hasPublicationYear "2014" @default.
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