Abstract
In this study, we determined the agronomic traits and yields of peanuts under different intercropping models by carrying out tests on variety selection, row spacing, and film mulching during sowing of intercropped peanuts. We analyzed the high-yield and comprehensive benefits in order to determine the efficient cultivation models of cassava/peanut intercropping. The results showed that among the eight tested peanut varieties, Guihua771 was the most suitable for intercropping with cassava, and its yield was 18.7% higher than Guihua17 – the local control variety – followed by Guihua22 and Guihua836. In the intercropping model selection test, the yield income of one row of cassava, intercropped with two rows of peanuts, under medium-narrow spacing (0.9-1.1m) was significantly higher than that of one row of cassava intercropped with three or four rows of peanuts with wide spacing (1.3-1.4m). The income of intercropped peanuts with film mulching was higher than that without the film, and the income from cassava and peanut intercropping 15d apart was higher than that of planting the cassava and peanuts at the same time. The best overall yield income was obtained when using Guihua771 as the peanut variety, intercropped with cassava using a row spacing arrangement of one row of cassava with two rows of peanuts, and planting the peanuts 15d ahead of the cassava, with mulching film.
Highlights
Cassava is mainly planted in south China, with the largest planting area in Guangxi, occupying 60% of China’s cassava planting area
The results showed that the yield of Guihua771 was the most stable among the six tested varieties, suggesting that Guihua771 was most suitable for intercropping with cassava, followed by Guihua 22 and Guihua 836
The single plant yield was the largest when intercropping two rows of peanuts with medium cassava row spacing (1.1 m), 24.3% higher than that from one row of cassava intercropped with two rows of peanuts with narrow spacing (0.9 m), and 26.7% higher than that from one row of cassava intercropped with four rows of peanuts with wide spacing (1.5 m)
Summary
Cassava is mainly planted in south China, with the largest planting area in Guangxi, occupying 60% of China’s cassava planting area. The peanut plant is short, with a short growth period (about 4 months) and narrow row spacing (0.4 m), forming complementary "long-short," "high-low," and "wide-narrow" effects with cassava in the ecological niches of time, space, and nutrition. Intercropping these two plants can effectively integrate land, light, and heat resources, making intensive use of time and space to maximize economic and ecological benefits, increase yield and income, and improve land utilization and maintenance. Cassava/peanut intercropping is of great significance for full utilization of limited cultivated land resources in south China.
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