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N-Exponential Fertilization Could Affect the Growth and Nitrogen Accumulation of metasequoia glyptostroboides seedling in a Greenhouse Environment

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Phyton-International Journal of Experimental Botany 2022年第10期91卷 2211-2220页

作者： Jiasen Wu Genping Tong Rui Guo Zihao Ye Jin Jin Haiping Lin Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration Hangzhou311300China Qingliangfeng National Nature Reserve Administration Lin’an311300China State Key Laboratory of Subtropical Silviculture Hangzhou311300China

metasequoia glyptostroboides(***)is a unique plant species related to relic flora in *** plays a positive role in afforestation and its long-term protection with high paleoclimate research ***,due to the nutrients-supply deficiency,it is a big challenge to cultivate the high-quality seedlings of ****** this study,a pot experiment in a greenhouse environment was carried out to identify the effect of N-exponential fertilization on the growth and nutrient distribution of *** *** ***tostroboides rooted seedlings with 12-month growth were *** N fertilizer levels with conventional fertilization(CF:5.0 g seedling^(−1)),exponential fertilization including EF1,EF2,EF3 and EF4 were *** relevant growth indexes were measured after 210-day *** results indicated that non-significant differences in seedlings’height and ground diameter were found among the above treatments(P>0.05);At the same time,N-exponential fertilization promoted the ***’s biomass in different organs(P<0.05),with the maximum total biomass under EF3 *** N accumulation in root and stem of the N-exponential fertilization treatments were increased in to some extent(P<0.05).The maximum N accumulation was also found under EF3 ***,steady-state nutrition and superior growth performance of ***boides could be obtained by N-exponential fertilization of 5.0 g cutting^(−1).

关键词： metasequoia glyptostroboides seedling nitrogen exponential fertilization plant growth biomass nutrient supply

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