%0 Journal Article
%T Luxury Absorption of Phosphorus Exists in Maize When Intercropping with Legumes or Oilseed Rape〞Covering Different Locations and Years
%J Agronomy | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/agronomy9060314
%X Rational regulation of phosphorus (P) use in the soil每rhizosphere每plant system is challenging in the development of sustainable, intensive, and healthy agriculture. Rational maize ( Zea mays L.) based intercropping with legumes/oilseed rape across six experimental sites from 2008 to 2017 proved advantageous over monoculture in terms of both maize biomass production and P uptake. The partial land equivalent ratio (PLER) for P uptake by intercropped maize averaged from 0.58 to 0.92, which was significantly higher than that for biomass production (0.51每0.78), indicating that the advantage of P acquisition by intercropped maize was superior to that of biomass accumulation. It was the excessive accumulation of P in intercropped maize compared to monoculture, especially higher P concentrations in grains that led to the superior P acquisition advantage and luxury absorption of P. P concentrations in maize grains were significantly increased from 1.89每2.91 mg kg ˋ1 in monoculture to 2.09每3.65 mg kg ˋ1, in intercropping, by 8.3%每25.5%. The plant internal P use efficiency of maize was significantly decreased from the initial 411.7每775.7 kg kg ˋ1 in monoculture to 345.7每710.4 kg kg ˋ1 in intercropping by 4.9%每16.0%, and 100 kg maize grain P quantities were significantly increased from 0.25每0.46 kg to 0.27每0.54 kg by 7.0%每17.4%. Rational fertilizer P input maximized maize yields and P use without decreasing the interspecific ecological advantages and harvest indexes of grain yields and P. These findings promoted better understanding of P allocation status within maize plants, and yield and P acquisition advantages through the exploitation of the biological potential of plants for the efficient utilization of P resources in diverse species combinations. View Full-Tex
%U https://www.mdpi.com/2073-4395/9/6/314