摘要
[Objectives] The aim was to study the effects of humic acid and DMPP on the growth of maize and explore the appropriate added concentration to provide basis for industrial production. [Methods]The pot experiment was used to study the effects of adding different concentrations of humic acid,DMPP and their compound on the growth of maize. [Results] Both humic acid and DMPP could increase plant height,stem diameter,SPAD and biomass of maize. The effect of adding 10 kg of humic acid per t was better than that adding 5 kg,and biomass increased by 5. 4% and 3. 3% compared with CK. The effect of adding 1 kg of DMPP was better than that adding 0. 5 kg,and biomass increased by 5. 7% and 2. 7% compared with CK. The compound application of the 2 improved the fertilizer efficiency. The best treatment was 5‰ humic acid ＋ 1 ‰ DMPP,which could increase plant height,stem diameter,SPAD,and dry weight by 8. 1%,12. 3%,10. 6%,and 10. 7%,respectively,and it also had lower economic costs compared with the compounding application of 10‰ humic acid ＋ 1‰ DMPP.[Conclusions]The 5‰ humic acid ＋ 1 ‰ DMPP compound fertilizer formula was more suitable for application in maize production.
[Objectives] The aim was to study the effects of humic acid and DMPP on the growth of maize and explore the appropriate added concentration to provide basis for industrial production. [Methods]The pot experiment was used to study the effects of adding different concentrations of humic acid,DMPP and their compound on the growth of maize. [Results] Both humic acid and DMPP could increase plant height,stem diameter,SPAD and biomass of maize. The effect of adding 10 kg of humic acid per t was better than that adding 5 kg,and biomass increased by 5. 4% and 3. 3% compared with CK. The effect of adding 1 kg of DMPP was better than that adding 0. 5 kg,and biomass increased by 5. 7% and 2. 7% compared with CK. The compound application of the 2 improved the fertilizer efficiency. The best treatment was 5‰ humic acid ＋ 1 ‰ DMPP,which could increase plant height,stem diameter,SPAD,and dry weight by 8. 1%,12. 3%,10. 6%,and 10. 7%,respectively,and it also had lower economic costs compared with the compounding application of 10‰ humic acid ＋ 1‰ DMPP.[Conclusions]The 5‰ humic acid ＋ 1 ‰ DMPP compound fertilizer formula was more suitable for application in maize production.
基金
Supported by the Research and Demonstration of Key Technologies for Crop Cost-Effective and High-Yield Production of the Project for Industry Leading Talents of Taishan(Lukezi[2016]NO.16)
