TY  - JA
AU  - Manske, G.G.B.
AU  - Ortiz-Monasterio,I.
AU  - Ginkel,M.Van
AU  - González,R.M.
AU  - Fischer,R.A.
AU  - Rajaram,S.
AU  - Vlek,P.L.G.
TI  - Importance of P uptake efficiency versus P utilization for wheat yield in acid and calcareous soils in Mexico
SN  - 1161-0301
PY  - 2001///
CY  - Amsterdam (Netherlands)
PB  - Elsevier
KW  - Nutrient uptake
KW  - AGROVOC
KW  - Phosphorus
KW  - Statistical analysis
KW  - Triticum aestivum
KW  - Yields
KW  - Genotypes
KW  - Mexico
N1  - Peer review; Peer-review: Yes - Open Access: Yes|Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=1161-0301
N2  - There are large agricultural areas in the world where wheat yields are limited by low phosphorus (P) availability. Breeding for P uptake and P utilization efficiency may reduce this problem. This study was conducted to determine the contribution of P uptake and utilization efficiency to grain yield of selected spring wheat genotypes in different environments. Thirty-eight semidwarf spring bread wheat (Triticum aestivum) genotypes were grown in two experiments in Mexico, each on an acid Andisol under rainfed conditions and on a calcareous Aridisol with irrigation, without (−P) and with 35 kg P per ha fertilized (+P). Without P fertilization, grain yield ranged from 0.8 to 4.6 t ha−1 in the acid soil and from 2.4 to 5.2 t ha−1 in the calcareous soil. With P fertilization, this range was even larger. Under conditions of P deficiency, i.e. in the acid soil at −P and +P (high P adsorption) and calcareous soil at −P (P-depleted soil), P uptake explained 71–100% of the variation in grain yield, and was highly correlated with grain yield (r=0.79–0.95). In contrast, at +P in the calcareous soil, P utilization efficiency explained 60–63% of the variation in grain yield. Here, low grain P concentration was related to high grain yield (r=−0.40 to −0.59). In the calcareous soil, the harvest index was correlated with grain yield, irrespective of the P level. In the acid soil, post-anthesis P accumulation was important. It was positively correlated with grain yield, whereas in the calcareous soil, no post-anthesis-P accumulation occurred. Here, grain P accumulation at maturity was completely determined by translocation of pre-anthesis shoot P. We conclude that the combination of improved P uptake and P utilization efficiency in the same genotypes requires selection under both high and low-P conditions
UR  - https://hdl.handle.net/20.500.12665/433
DO  - https://doi.org/10.1016/S1161-0301(00)00099-X
T2  - European Journal of Agronomy
ER  -