Management effects on bioenergy sorghum growth, yield and nutrient uptake

Wight, J.P. and Hons, F.M. and Storlien, J.O. and Provin, T.L. and Shahandeh, H. and Wiedenfeld, R.P. (2012) Management effects on bioenergy sorghum growth, yield and nutrient uptake. Biomass and Bioenergy. pp. 1-12.

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Bioenergy sorghum (Sorghum bicolor L. Moench.) productivity and nutrient uptake may be affected by cropping sequence complexity, fertilization, and residue removal. The goal of this research was to optimize the efficiency of crop management in high biomass (bioenergy) sorghum systems. The two-year field study was conducted in two diverse locations near College Station and Weslaco, Texas. The study utilized a complete factorial design with four replications of the following factors: Rotation: continuous biomass sorghum vs. biannual rotation with corn (Zea mays L.); Stover Return: 0, 25, 50% of the sorghum biomass and all corn stover; and N Rate: 0 vs. non-limiting N. The bioenergy sorghum used was a high-yield photoperiod-sensitive hybrid. Other inputs and practices were those commonly used in the respective areas. Sorghum was harvested for yield, and C, N, P and K, were determined. Rotation, fertilization, and residue return affected yields, plant growth, and nutrient uptake (p < 0.05). Total yields, C, N, P, and K uptake in sorghum were significantly increased by rotation and N fertilization both years, while 25% residue return increased sorghum yield and N uptake at College Station the first year. Uptake of C, N, P and K were increased by N fertilization. Sorghum tissue concentrations of N, P and K declined from the first to the second year although mean yield increased, possibly indicating decreased soil nutrient availability after only two years. A regression equation was developed relating biomass yield and site, rotation, nitrogen rate, and plant physical traits (R2 = 0.67).

Item Type: Article
Uncontrolled Keywords: Biomass; Sorghum; Cropping systems; Fertilization; Nitrogen; Rotation; Nutrient uptake
Author Affiliation: rtment of Soil and Crop Sciences, Texas A & M University, 2474 TAMU, College Station, TX 77843, USA b Texas AgriLife Research and Extension Center, Weslaco, TX 78596, USA
Subjects: Plant Protection
Soil Science and Microbiology > Microbiology
Crop Improvement
Divisions: Sorghum
Depositing User: Mr. SanatKumar Behera
Date Deposited: 05 Aug 2012 10:49
Last Modified: 05 Aug 2012 10:52
Official URL:

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