Relation of Residue Biomass after Defoliation to Regrowth Dry Matter, WSC and Grain Yield of Winter Wheat

Presenter Information

Lihua Tian, Lanzhou University, ChinaFollow
Qingping Zhang, Lanzhou University, China
Yuanbuo Liu, Lanzhou University, China
Yuying Shen, Lanzhou University, ChinaFollow
Lindsay W. Bell, CSIRO, Australia
Jeremy P. M. Whish, CSIRO, Australia

Description

The importance of defoliation height on final yield in dual-purpose wheat is inconsistent. In one study no difference in final wheat yield following a severe grazing at 2 cm compared to light grazing at 6 cm was found (Dann et al. 1983). In contrast, clipping at 3 cm above ground level significantly reduced grain yield compared to 7 cm (Arzadun et al. 2006). An explanation for these inconsistent results may be an underestimation of the value of the remaining biomass and its role in the regrowth process (Fulkerson and Donaghy 2001).

In this study, the percentage of residue biomass remaining after defoliation was considered when examining the effect of defoliation height on dry matter accumulation and water-soluble carbohydrate (WSC) during wheat regrowth on the Loess plateau, China.

Citation

Tian, Lihua; Zhang, Qingping; Liu, Yuanbuo; Shen, Yuying; Bell, Lindsay W.; and Whish, Jeremy P. M., "Relation of Residue Biomass after Defoliation to Regrowth Dry Matter, WSC and Grain Yield of Winter Wheat" (2020). IGC Proceedings (1993-2023). 16.
https://uknowledge.uky.edu/igc/22/1-15/16