Yield Responses of Grain Sorghum and Cowpea in Binary and Sole Cultures under No-Tillage Conditions in Limpopo Province

Abstract

Climate change is severely disrupting ecosystem services and crop productivity, resulting in lower crop growth and yields. Studies have emphasized the importance of assessing conservation practices through crop modelling to improve cropland productivity. There is a lack of accurate information in the performance of conservation practices as well as data for improved crop modelling. No-tillage sorghum–cowpea intercrop experiments were established to assess the productivity of four sorghum cultivars and cowpea at two densities of 37,037 and 74,074 per plants and generate data for improved crop modelling. The leaf area index (LAI) varied in sorghum cultivars and cowpea densities during the two growing seasons. Cultivars Enforcer and NS5511 produced the highest grain yields of 4338 kg per ha and 2120 kg per ha, respectively, at Syferkuil. Ofcolaco’s Enforcer and Avenger were the highest yielding cultivars at Ofcolaco, with mean yields of 2625 kg per ha and 1191 kg per ha, respectively. At Syferkuil, cowpea yield was 93% and 77% more in sole compared to binary cultures during the growing seasons at Syferkuil. At Ofcolaco, sole yielded approximately 96% more grain than binary. The findings confirm that for the sorghum–cowpea intercrop to improve overall system productivity, cowpea density should be increased.

Sustainable Agriculture: Theories, Methods, Practices and Policies

“…Marta M. Moreno et al [11] analyzed the degradation of biodegradable (BD) plastic mulch with different compositions in different soil types, and proposed that different compositions of biodegradable (BD) plastic mulch should be selected for different soils. Taking Limpopo Province as an example, Tlou E. Mogale et al [12] evaluated the productivity of different species of sorghum intercropping at different cowpea densities, and proposed that the combination of intercropping and no-tillage can improve crop yield and productivity, thereby promoting agricultural sustainability. Taking the rice-fish coculture system in Jingning, Qingtian, and Yongjia counties of Zhejiang Province as an example, Ye et al [13] compared and evaluated the effects of various aquaculture and rice-fish coculture systems on the genetic diversity of aquatic animals, and proposed that the implementation of the rice-fish coculture system can improve the genetic diversity and food security of aquatic species, thereby promoting agricultural sustainability.…”

Understanding the Impact of the Intercropping System on Carbon Dioxide (CO2) Emissions and Soil Carbon Stocks in Limpopo Province, South Africa

“…Te spacing between sorghum and cowpea in the intercropped treatment was thus 0.45 m, and the size of the experimental unit was 10.8 m 2 . Te details of the experimental design and management are also outlined by Mogale et al [12].…”