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Four-Year Foliar and Growth Response to Multinutrient Fertilization in Northeast Oregon Item Info

Results from this study show foliar nutrient deficiencies and multi-nutrient fertilization response for ponderosa pine, grand fir and Douglas-fir over a period of four consecutive growing seasons. Generally, through critical level or vector foliar diagnosis, N, S, B, Cu and possibly Mo were identified as being deficient for all species in this study. Additionally, Douglas-fir on the Noregaard site showed foliar K deficiency response. Distinct foliar nutrient response patterns were observed for those "strong responding" nutrients, particularly N and B where foliar response increased, peaked then declined in magnitude relative to the control as the year since fertilization increased. Delayed nutrient response may have been to spring fertilizer application not having manifested itself in time to show strong nutrient response one growing season after fertilization. Similar to foliar nutrient response, foliar needle weight growth increased, peaked then declined in magnitude relative to the control as the year since fertilization increased. Additionally, needle weight response was delayed due to spring fertilization. Needle weight response was significant for ponderosa pine and Douglas-fir but not for grand fir. Overall, four-year cubic foot volume response was significantly higher on the multi-nutrient treatment than the controls, with relative gross cubic foot volume response for both sites combined showing a 26.9% increase. Individual site response revealed that much of the combined relative cubic foot volume response was expressed on the Clear Creek site, which showed a 34% increase over the controls while the Noregaard site only showed a 3.9% increase. Periodic relative gross basal area response for both sites combined was greater in the first two-year period (26.9%) than the second two-year period (11.1%). Periodic relative basal area response for the Clear Creek unit was 32% the first two-year period and 23% the second two-year period while the Noregaard site response was 18.6% the first period and -6.5% the second.

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Title:
Four-Year Foliar and Growth Response to Multinutrient Fertilization in Northeast Oregon
Creator:
Shaw, T.M.; Moore, J.A.
Date Created (ISO Standard):
2000-03-01
Description:
Results from this study show foliar nutrient deficiencies and multi-nutrient fertilization response for ponderosa pine, grand fir and Douglas-fir over a period of four consecutive growing seasons. Generally, through critical level or vector foliar diagnosis, N, S, B, Cu and possibly Mo were identified as being deficient for all species in this study. Additionally, Douglas-fir on the Noregaard site showed foliar K deficiency response. Distinct foliar nutrient response patterns were observed for those "strong responding" nutrients, particularly N and B where foliar response increased, peaked then declined in magnitude relative to the control as the year since fertilization increased. Delayed nutrient response may have been to spring fertilizer application not having manifested itself in time to show strong nutrient response one growing season after fertilization. Similar to foliar nutrient response, foliar needle weight growth increased, peaked then declined in magnitude relative to the control as the year since fertilization increased. Additionally, needle weight response was delayed due to spring fertilization. Needle weight response was significant for ponderosa pine and Douglas-fir but not for grand fir. Overall, four-year cubic foot volume response was significantly higher on the multi-nutrient treatment than the controls, with relative gross cubic foot volume response for both sites combined showing a 26.9% increase. Individual site response revealed that much of the combined relative cubic foot volume response was expressed on the Clear Creek site, which showed a 34% increase over the controls while the Noregaard site only showed a 3.9% increase. Periodic relative gross basal area response for both sites combined was greater in the first two-year period (26.9%) than the second two-year period (11.1%). Periodic relative basal area response for the Clear Creek unit was 32% the first two-year period and 23% the second two-year period while the Noregaard site response was 18.6% the first period and -6.5% the second.
Subjects:
research (document genres) fertilizer timber (lumber) statistics
Location:
North and Central Idaho; Eastern Washington; Western Montana; Northeastern Oregon
Publisher:
Intermountain Forest Tree Nutrition Cooperative, University of Idaho, College of Forest, Wildlife and Range Sciences, Moscow
Source:
Shaw, T.M. and J.A. Moore. 2000. Four-Year Foliar and Growth Response to Multi-Nutrient Fertilization in Northeast Oregon. IFTNC, College of Natural Resources, Univ. of Idaho, Moscow.
Source Identifier:
Four-year_Foliar_and_Growth_Response_to_Multinutrient_Fertilization_in_Northeast_Oregon_IFTNC_2000
Type:
text
Format:
application/pdf

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Source
Preferred Citation:
"Four-Year Foliar and Growth Response to Multinutrient Fertilization in Northeast Oregon", Idaho Forestry Research Collection, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/forestryresearch/items/forestryresearch915.html
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Educational use includes non-commercial use of text and images in materials for teaching and research purposes. Digital reproduction rights granted by University of Idaho Library. For other uses beyond educational use, please contact University of Idaho Library Special Collections and Archives Department at libspec@uidaho.edu.
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