Harvest index and straw yield of five classes of wheat

Abstract

Wheat straw is a potential cellulosic feedstock for bioethanol. This study was conducted to evaluate straw yield potential and its relationship with grain yield for wheat (Triticum spp.) grown in the United States. The specific objective was to determine if differences in straw yield and harvest index (HI) exist between and within regions and/or wheat classes. Using ongoing variety performance trials in eight states, a total of 255 varietal trial entriess from five classes of wheat were surveyed for above-ground biomass. Averaged over all wheat classes and regions the HI was 0.45. Soft red winter wheat in Kentucky had, on average, the highest HI and lowest straw yield among regions and wheat classes. Soft white winter wheat under irrigation in the Pacific Northwest produced the highest straw yield. Hard red winter wheat in the southern plain states of Texas and Oklahoma had, on average, the lowest HI. Differences in the amount of precipitation and cultivars were the major contributors to the variation detected within wheat classes. The amount of wheat straw available as cellulosic feedstock in a state or wheat class can be estimated using the grain yield estimates provided by the National Agricultural Statistics Service and the class specific HI.

Analysis of Agro-Morphological Characters in Wheat (Triticum aestivum L.) Genotypes for Yield and Yield Components

“…Enhancing in harvest index will boost grain yield. Similar findings have also been reported by (Dai, et al, 2016) and (Ahmad, et al, 2010).…”

Field‐Scale Evaluation of Biosolids‐Derived Organomineral Fertilizers Applied to Winter Wheat in England

“…(e.g., White and Wilson, 2006) and international studies (e.g., Sinclair, 1998;Dai et al, 2016) using modern wheat cultivars. Seasonal effects of rainfall had a significant influence on harvest index due to the impact of drought (spring 2010) on ears per m 2 (number of grains), but also because of shorter duration of the grain-filling phase that year.…”

Lignocellulosic biomass from agro‐industrial residues in South America: current developments and perspectives

“…However, other crops are also prominent, such as wheat, cassava, rice, banana, and oil palm. Processing these crops generates large amounts of solid residues, including in‐field or agricultural residues (straw, leaves, and foliage) and agro‐industrial processing residues (bagasse, bunches, and shells) with diverse composition and volume (Table ) …”