Mitigating the effects of future climate on maize productivity

Abstract

Current climate changes affect agricultural production. Crop management strategies can be used to mitigate these effects. This study was carried out to evaluate the use of crop and soil management strategies to mitigate the effects of future climate on maize yield in mesoregions of the state of Minas Gerais, Brazil. The CSM-CERES-Maize model was used to simulate the effect of maize root system depth and of the amount of plant residue left on the soil surface by the previous crop in maize yield for different scenarios of change in precipitation and solar radiation. The decrease in rainfall volume reduced the average maize yield in some regions by more than 50%. The increase in solar radiation maize yield rise, while its reduction caused more than 20% yield drop in most regions. The management strategies evaluated have the potential to mitigate such effects.

Transmission of photosynthetically active radiation and the productivities of soybean and maize in agroforestry systems

“…According to the DSSAT cropping system model CERES-Maize, light is a key limiting factor to maize growth and productivity and its reduction can cause decreases in yield of more than 20% in most regions of Brazil (Magalhães, Andrade, et al, 2019). Moreover, a study by Bieluczyk et al (2021) involving eucalyptus-maize integrated systems revealed that the shade produced by eucalyptus trees reduced plant height (up to 33%), ear insertion height and stem diameter of the crop plants.…”

“…The importance of PAR in the processes of photoassimilation and growth in maize has been verified by Gao et al (2017) who reported that shading at different stages significantly decreased grain yield, dry matter accumulation, root dry weight, root/shoot ratio, root length density, root absorption area and active absorption area. According to the DSSAT cropping system model CERES‐Maize, light is a key limiting factor to maize growth and productivity and its reduction can cause decreases in yield of more than 20% in most regions of Brazil (Magalhães, Andrade, et al, 2019). Moreover, a study by Bieluczyk et al (2021) involving eucalyptus‐maize integrated systems revealed that the shade produced by eucalyptus trees reduced plant height (up to 33%), ear insertion height and stem diameter of the crop plants.…”

Diagnóstico do nitrogênio foliar do milho (>i<Zea mays>/i< L.) a partir de dados hiperespectrais

“…Esta cultura pertence ao gênero de plantas C4 que possuem como diferencial alto aproveitamento na fixação de CO2 (SILOTO, 2002;FANCELLI e DOURADO NETO, 2004;HORN et al, 2006;TAIZ e ZEIGER, 2004). Por ser uma planta de metabolismo C4 e possuir elevada eficiência na utilização da luz solar e CO2, umas de suas limitações na produtividade pode estar relacionada a deficiência de luz em períodos críticos ao seu desenvolvimento (MAGALHÃES et al, 2020).…”