首页   按字顺浏览 期刊浏览 卷期浏览 Aerial accumulation and partitioning of nutrients by hard red spring wheat*†
Aerial accumulation and partitioning of nutrients by hard red spring wheat*†

 

作者: R. O. Miller,   J. S. Jacobsen,   E. O. Skogley,  

 

期刊: Communications in Soil Science and Plant Analysis  (Taylor Available online 1994)
卷期: Volume 25, issue 11-12  

页码: 1891-1911

 

ISSN:0010-3624

 

年代: 1994

 

DOI:10.1080/00103629409369162

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

Periods of maximum hard red spring (HRS) wheat(Triticum aestivum L.)nutrient demand need to be determined in order to develop best nutrient management practices, and to provide data for nutrient uptake modeling. Aerial (aboveground biomass) whole plant samples of irrigated HRS wheat were collected from the field at 16 growth stages and separated into leaves, stems, heads, and grain for dry matter determinations and analyzed for nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sulfur (S), chloride (Cl), zinc (Zn), manganese (Mn), iron (Fe), and copper (Cu) concentrations. Accumulation curves were computed for each plant part for the growing season from compound cubic polynomial models based on accumulated growing degree units (GDUs). Total aerial accumulations of dry matter, N, P, K, Ca, Mg, S, Cl, Zn, Mn, Fe, and Cu were 14400, 116, 30.8, 103, 9.2, 9.3, 15.2, 32.3, 0.18, 0.58, 2.05, and 0.045 kg/ha, respectively. Grain at maturity accumulated greater than 78% of the total aerial N, P, and Zn, while it contained less than 20% of the aerial accumulated K, Ca, Cl, and Fe. Nitrogen and Fe were rapidly accumulated near 200 GDU, while P, K, Ca, Mg, S, Cl, Zn, Mn, and Cu were most rapidly accumulated near 600 GDU. Accumulation rates were 183, 2.9, 0.90, 0.72, 0.008, 1.41, 0.29, and 0.12 kg/ha/d for dry matter, N, P, K, Ca, Mg, S, and Cl, respectively, and 136, 1.7, 0.48, 0.13, 0.004, 0.78, 0.20, and 0.02 g/ha/d, respectively, during grainfill. This plant information suggests the timing of in‐season nutrient applications and, when integrated with other agronomic practices, could improve overall nutrient management for HRS wheat in the northern Great Plains.

 

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