Impact of various maize‖peanut models on peanut yield,nitrogen,and calcium nutrient absorption
To clarify the impact of different maize‖peanut intercropping patterns on peanut production,dry matter accumulation,yield formation,as well as nitrogen and calcium nutrient absorption were investigated.Five planting modes were set,namely maize monoculture(SM),peanut monoculture(SP),maize‖peanut row ratios of 3:4(IMP1),3:6(IMP2),and 6:8(IMP3).Experimental results from 2018 to 2019 showed that both maize and peanut yields under intercropping were lower than under monoculture,but the land equivalent ratios of the 3 intercropping patterns were all greater than 1,with IMP2 being the highest.For the total yield of the intercropping system,IMP1 and IMP2 showed no significant difference but were significantly higher than IMP3.The total yields of IMP1 and IMP2 were increased by 4.69%-4.70%and 5.04%-5.97%compared to IMP3,respectively.After pod setting,the dry matter,nitrogen,and calcium accumulations of intercropped peanut population were significantly lower than those in monoculture.Among the 3 different intercropping patterns,IMP2 had significantly higher dry matter,nitro-gen,and calcium accumulation than IMP1 and IMP3.At maturity,dry matter accumulation of peanut population in IMP2 was increased by 40.07%-47.16%and 25.24%-25.72%compared to IMP1 and IMP3,respectively;nitrogen accumulation increased by 33.63%-43.28%and 26.58%-29.34%,respectively;and calcium accumulation in-creased by 33.48%-49.06%and 34.25%-38.97%,respectively.These accumulations of the middle ridge(MR)pea-nut population in IMP2 and IMP3 were higher than those of the east ridge(ER)and west ridge(WR),but the differ-ences were not significant.In conclusion,maize-peanut row ratio of 3:6 exhibited significant intercropping advan-tages.
maize intercropping with peanutdry matter accumulationnitrogen accumulationcalcium accu-mulationyield
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