TY - JOUR
T1 - A simple, low-cost technique for in situ measurement of leaf P concentration in field-grown rice
AU - Yamane, Koji
AU - Mabesa-Telosa, Ranee C.
AU - Tajima, Ryosuke
AU - Banayo, Nino P.M.C.
AU - Kato, Yoichiro
PY - 2019/2/1
Y1 - 2019/2/1
N2 - Simple tools for diagnosing crop nutritional status are in great demand by agricultural extension staff, particularly in low-fertility environments. We developed the first practical method for in situ diagnosis of phosphorus (P) nutrition in field-grown cereal crops by using a handheld colorimeter. The concentration of P in extracts from fresh leaves of lowland rice grown under various P availabilities was closely correlated with that of oven-dried leaves measured with the standard molybdenum-blue method in the laboratory, over a range of values from 0.319 to 1.420 mg P g −1 DW (r = 0.885 ** , n = 14). It takes only 3–5 min to estimate the P concentration of plant samples using the new technique. Although not as accurate as the laboratory method, the new method can easily detect P deficiency of rice in the field (and possibly other cereal crops) without requiring costly, off-site equipment. Thus, extension staff and agronomists can easily adopt this technique.
AB - Simple tools for diagnosing crop nutritional status are in great demand by agricultural extension staff, particularly in low-fertility environments. We developed the first practical method for in situ diagnosis of phosphorus (P) nutrition in field-grown cereal crops by using a handheld colorimeter. The concentration of P in extracts from fresh leaves of lowland rice grown under various P availabilities was closely correlated with that of oven-dried leaves measured with the standard molybdenum-blue method in the laboratory, over a range of values from 0.319 to 1.420 mg P g −1 DW (r = 0.885 ** , n = 14). It takes only 3–5 min to estimate the P concentration of plant samples using the new technique. Although not as accurate as the laboratory method, the new method can easily detect P deficiency of rice in the field (and possibly other cereal crops) without requiring costly, off-site equipment. Thus, extension staff and agronomists can easily adopt this technique.
KW - Oryza sativa
KW - nutrient deficiency
KW - on-farm research
KW - phosphorus
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U2 - 10.1002/jpln.201800187
DO - 10.1002/jpln.201800187
M3 - Article
AN - SCOPUS:85057820577
VL - 182
SP - 28
EP - 30
JO - Agribiological Research: Zeitschrift für Agrarbiologie -Agrikulturchemie -Oekologie
JF - Agribiological Research: Zeitschrift für Agrarbiologie -Agrikulturchemie -Oekologie
SN - 1436-8730
IS - 1
ER -