Selection of suitable silage maize varieties in the Bijie region based on yield, agronomic and nutritional evaluation

doi:10.11686/cyxb2019485

Abstract

Abstract: Animal husbandry is widely practiced to reduce poverty in Guizhou Province, and forage shortage is one of the major factors restricting the development of the industry in Guizhou, especially in Bijie region. In the present study, eight agronomic traits (growth period, biological yield, water content, plant height, panicle height, panicle weight, panicle length and leaf number) were analyzed in 35 silage maize varieties or lines, which were representative of the range of different varieties grown in the Bijie region. Among the selected varieties, Jinyu 908, Qingyu 1587, Qianyu 3 and Qianqing 4546 were early-maturing varieties (or lines); while Jinyu 818, GX276, L667 and Zhuqing 1 were late-maturing varieties (or lines). Yields of Jinyu 818, Qianyu 3, Jinyu 908, Qingyu 1587, L667, GX276, Qianqing 4546 and GX254 were significantly higher than those of the ‘reference’ line, Zhuqing 1. Eight nutritional traits, including dry matter, crude protein, crude fat, neutral detergent fiber, acid detergent fiber, crude ash, calcium and phosphorus, were also measured in the 35 silage corn varieties (or lines). In addition, the relative feeding value (RFV) and digestible energy (DE) were obtained by regression equation. Relative feeding value ranged from 94.81 to 200.10. Interestingly, the RFV of waxy maize lines was superior to that of non waxy maize lines. The differences between varieties or lines in DE were similar to those of RFV, and Qian-Nuo 868 and Jinyu 838 were the best lines. Based on multivariate evaluation of the yield, dry matter, RFV and DE data, the most suitable silage maize varieties or lines in the Bijie region were Jinyu 818, Qianyu 3, GX276, Jinyu 908, Qianqing 4546 and L667. Our study provides technical information to support the selection of silage maize varieties with superior performance potential to assist the development of grassland and livestock industry in Bijie region of Guizhou Province. Selection of superior crop varieties will potentially make a significant contribution to poverty reduction in this region.

Key words: silage corn, Bijie area, yield, quality

LOU Fen, LI Xiao-dong, SHANG Yi-shun, WU Jia-hai, ZHANG Rong, GAN Xiao-bo, XIONG Jun, CHEN Guang-ji, LI Shi-ge, PEI Cheng-jiang. Selection of suitable silage maize varieties in the Bijie region based on yield, agronomic and nutritional evaluation[J]. Acta Prataculturae Sinica, 2020, 29(6): 214-224.

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