摘要
在云南省林业科学院漾濞研究站的苗圃地内对美国山核桃1年生播种苗进行了全年的生长和生物量测定,并对其苗木的形态特征作了研究。据此,将美国山核桃1年生播种苗的生长划分为出苗期、幼嫩期、速生期和苗木硬化期4个时期。美国山核桃1年生播种苗在其生长期中苗高生长的速生期全年仅1次,而地径速生期则出现3次;其苗木地上部分粗壮、地下部分具深根性,地下部分生物量占全株的73.52%,全株含水量是其干生物量的1.36倍。
The growth and biomass of C. illinoensis seedlings cultivated in Yangbi research station of Yunnan Academy of Forestry were estimated for 1 year from seeding, and the morphological characteristics of seedlings was also observed. According to the estimation results, the growth of C. illinoensis seedlings were divided into 4 phases, namely emergence stage, seedling stage, fast growing stage and seedling hardening stage. The study results showed that there was only one time of quick growth of seedling height, but three times of quick growth of basal diameter. The aboveground part of C. illinoensis seedlings was thick, and the under-ground part was characterized by deep root system. The biomass of underground part accounted for 73.52 % of that of the whole plant. The weigh of water contented in the plant was 1.36 times of the weight of dry plant.
出处
《西部林业科学》
CAS
2008年第1期103-107,共5页
Journal of West China Forestry Science
关键词
美国山核桃
1年生播种苗
年生长节律
Carya illinoensis
one-year-old seedling
annual growth rhythm
