Abstract:

The experiment explored the effects of different row ratios of corn and peanut strip compound planting on the growth of two crops, aiming to find a suitable row ratio and provide theoretical support for field production. Taking‘Yamei 1’ corn variety and ‘Heyou 16’peanut variety as materials, the corn and peanut strip compound planting experiment was set up with six different intercropping row ratios of 2:4, 2:6, 2:8, 4:4, 4:6 and 4:8 and corn monoculture and peanut monoculture (recorded as: C₂P₄, C₂P₆, C₂P₈, C₄P₄, C₄P₆, C₄P₈, CK₁, CK₂). A random block design was adopted, each replicated three times, totaling 24 experimental cells. The SPAD value of leaves, plant agronomic traits, yield and other related indicators were measured during crop growth period. Compared with the monoculture, the yield per unit area of the two crops decreased to varying degrees, and the SPAD values of the leaves of the corn and peanut seedlings were not significantly different. Under the premise of the fixed number of corn planting rows, with the increase of the number of peanut planting rows in the middle and late stages of the growth period, the SPAD value of corn leaves, the actual yield and the SPAD value of peanut leaves, hundred fruit weight, hundred kernel weight, kernel rate and actual yield all showed an upward trend. The SPAD value, ear height, grain number per ear and seed rate of the 2-row corn planting belt were higher than those of the 4-row corn planting belt. The plant height, the first lateral branch length, the number of green leaves harvested, single kernel fruits, double kernel fruits, unfilled fruits and other indicators of C₄P₄ treatment were the highest. There was no significant difference in ear diameter and 100-grain weight of corn, but the four rows of corn planting belt significantly increased the bald tip length. Therefore, C₂P₈ (2 rows of corn and 8 rows of peanut) was suitable for the strip compound planting production of corn and peanut, and C₄P₄ (4 rows of corn and 4 rows of peanut) was the worst.

Key words: corn, peanuts, strip compound planting, agronomic traits, production