Establishment of Vicia sativa-Secale cereale mixed and intercropping methods for the Lhasa valley area

doi:10.11686/cyxb2017348

Abstract

Abstract: To establish cultivation methods suitable for the Lhasa Valley, we investigated the success of different mixed and intercropping patterns by measuring the yield and quality of forage from a legume, Vicia sativa (pea), and a grass, Secale cereale (rye). The results showed that the effective branch number and biomass of pea were lower under mixed sowing and intercropping than under monocropping, while the effective tiller number and biomass of rye increased under mixed sowing. Compared with intercropping, mixed sowing resulted in an interspecific relationship that resulted in better interspecific interactions and weaker negative interactions. Pea was at a competitive disadvantage in mixed cropping and intermittent cropping conditions. The relative yield value was less than 1 for rye in mixed cropping, but greater than 1 in intercropping conditions, indicative of its competitive advantage. Due to niche differentiation and interspecific interactions between the two species, the resource utilization rate of forage was improved in mixed and intercropping compared with monocropping, and the mixed and intercropping treatments had obvious yield advantages. The combination of V. sativa and S. cereale with an intercropping ratio of 2:1 resulted in the highest yield of fresh grass yield (5253 g·m^-2). The mixed ratio of 20% pea+80% rye resulted in the highest yield of hay (1572 g·m^-2). The overall yield was larger in the mixed treatments than in the monocropping treatments. The nutritional quality of the mixed forage was better than that of rye alone.

Key words: Vicia sativa, Secale cereal, mixtures, intercropping, establishment mode

WANG Fu-qiang, XIANG Jie, GUO Bao-guang, YU Cheng-qun, SHEN Zhen-xi, SHAO Xiao-ming. Establishment of Vicia sativa-Secale cereale mixed and intercropping methods for the Lhasa valley area[J]. Acta Prataculturae Sinica, 2018, 27(8): 39-49.

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