Effects of interplanting with Dolichos lablab on agronomic traits and yield of two varieties of silage maize

doi:10.11686/cyxb2018569

Abstract

Abstract: This research investigated intercropping of two varieties of silage maize (‘Zheng Silage No. 1’ and ‘Yu silage 23’) with Dolichos lablab with the aim of developing new methods to improve the agronomic traits and yield of silage maize. The experiment was carried out at Jiujiang Township, Songtao County, Guizhou Province, and included three treatments: silage maize with no intercropping, alternate rows of silage maize of D. lablab, and two rows of D. lablab between each row of silage maize. The yield of silage maize was higher for ‘Yu silage 23’ than for ‘Zheng silage No.1’ in all planting regimes and for both varieties yield was highest when interplanted with two rows of D. lablab between each row of maize, (55350 and 75411 kg·ha^-1 FM for ‘Zheng silage No.1’ and ‘Yu silage 23’, respectively), and lowest for the monoculture, with the one-row D. lablab interplanting regime having intermediate yield. The plant height was highest (299 cm for ‘Yu silage 23’) when intercropping one row of D. lablab, but yield was reduced compared to two-row intercropping (62014kg·ha^-1 FM for ‘Yu silage 23’). The leaf length of the agronomic character index of ‘Zheng silage No.1’ increased with the increase in the number of D. lablab interplanting lines, the leaf width and the panicle number decreased, but the variation of the agronomic traits of ‘Yu silage 23’ was just the opposite. The panicle length of ‘Zheng silage No.1’ was 37.24 cm when interplanted with two rows of D. lablab, while that of ‘Yu silage 23’ when not interplanted with D. lablab was 43.57 cm. In variation analysis, the yield and panicle number of two silage maize varieties were larger than 17%. The maximum income from ‘Zheng silage No.1’ and ‘Yu silage 23’ was calculated as 29336and 38 665 CNY·ha^-1, respectively. Thus, the economic benefit of ‘Yu silage 23’ is significantly better than ‘Zheng silage No.1’, and interplanting with two rows of D. lablab per row of maize is recommended.

Key words: interplanting, yield, gronomic traits, variation, correlation, silage maize, Dolichos lablab

LI Ya-jiao, MA Pei-jie, WU Jia-hai, MU Qiong, QIN Tao-ying, WANG Xiao-qiang, MA Ning, ZHANG Rong, LI De-fang, LANG Yong-xiang, WU You-song, TIAN Ying-xue, HAN Yong-fen. Effects of interplanting with Dolichos lablab on agronomic traits and yield of two varieties of silage maize[J]. Acta Prataculturae Sinica, 2019, 28(9): 209-216.

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