Organic amendment and inorganic fertilization affect soil properties and quality of Larix olgensis bareroot stock |
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Authors: | Hongxu Wei Chengyang Xu Barbara J Hawkins Lüyi Ma Lini Jiang |
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Institution: | (1) College of Forestry, Beijing Forestry University, Beijing, 100083, China;(2) Key Laboratory of Forest Silviculture and Conservation, Ministry of Education, Beijing, 100083, China;(3) Centre for Forest Biology, University of Victoria, Victoria, V8W 3N5, BC, Canada; |
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Abstract: | Bareroot Changbai larch (Larix olgensis Henry.) seedlings were reared with inorganic fertilizer (nitrogen (N):phosphorus (P) = 1:1, W/W) applied at a rate of 100
(F100) or 200 kg N ha−1 (F200) with (+) or without (−) chicken manure as a soil amendment (O) in north-eastern China. An unfertilized control treatment
was included. Inorganic and organic fertilizer treatments tended to increase soil ammonium, nitrate, available P, total P,
organic carbon content and electrical conductivity, and biomass and N concentration in seedlings. Organic amendment improved
first order lateral root number, tap root length, fine root morphology (length, surface area, volume) in seedlings, while
the F100 treatment increased N accumulation in needles and stems compared to the F200 treatment, on average. Most fertilizer
treatments tended to increase P content in combined stems and roots, but F200 − O and F100 + O treatments diluted P in needles.
Organic amendment combined with inorganic fertilizer at a rate of 100 kg N and P ha−1 is recommended to improve seedling growth and N reserves in woody tissues. |
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