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| Biomass and nutrient distribution of Camellia oleifera |
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| Abstract: |
| Biomass and nutrient distribution of oil tree forest，and the correlation between its soil nutrients and
nutrient elements in different organs were studied by selecting four-year-old Camellia oleifera in Pingyuan county and
oil tea seedlings in Mountain Changgang as test materials. The results showed that the average biomass of C. oleifera
in Pingyuan county was 2 331.93 g per tree，and that of different organs was in the order of root ＞ leaf ＞ fruit ＞
stem ＞ branch，that in different organs of C. oleifera seedlings in Mountain Changgang was，however，in the order
of leaf ＞ stem ＞ root ＞ branch. C. oleifera’s nutrient content sorted by organs was in the order of N ＞ K ＞ P，
Ca ＞ Mg，and B ＞ Zn. Moreover，the upper leaves contained more N，P，K，Mg than the lower ones. There were
31 pairs of correlation coefficient among nutrients in different organs of C. oleifera，which reached significant or even
extremely significant level. The order of soil nutrient content of C. oleifera forest land was total K ＞ total N ＞ total P ＞
exchangeable Ca ＞ exchangeable Mg，effective Zn ＞ effective B. Content order of soil organic matter，exchangeable
Ca，exchangeable Mg，effective Zn and effective B was obviously downhill ＞ middle slope ＞ upper slope. There was
a various relation among nutrients in soil and those in different organs of C. oleifera：first of all，soil nutrients were most
closely associated with that of fruit，so was soil exchangeable Ca，exchangeable Mg and organic matter with the plant
nutrients；secondly，soil exchangeable Ca content and Ca content in different organs were all positively correlated；
last but not least，soil total N and total P content，N and
P content of each organ was positively related to each
other，while soil available P and total K content were
negatively correlated with P and K content of all organs，
respectively. |
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