论文部分内容阅读
对贵州省黔东南州杉木林分生长状况进行调查及分析研究,通过土壤改良试验、施肥试验、土壤改良与施肥的综合试验等三项措施的试验研究分别就它们对中、幼林材积生长的影响进行了方差分析,并进一步对方差显著的试验用q法进行多重比较。通过试验及分析,提出了杉木低改技术措施。结果表明,通过这些措施可有效改善杉木中、幼林低产状况:提高杉木用材林低产林分单株材积41%以上,提高杉木商品材等级0.5~1.0以上。低改实施后投入效益预计可提高1.5倍以上。
The investigation on the growth status of Chinese fir in Qiandongnan Prefecture of Guizhou Province was carried out. The effects of three measures including soil improvement experiment, fertilization experiment, soil improvement experiment and fertilization experiment on the growth of medium and young plantation were studied respectively An analysis of variance was performed and multiple comparisons were further performed using the q-test for significant variance tests. Through the experiment and analysis, the technical measures of low altering fir was proposed. The results showed that these measures could effectively reduce the low yield of young and middle-aged Chinese fir plantations: increase the single plantation volume of low-yield forests of Chinese fir plantation by more than 41% and improve the grade of Chinese fir plantation materials by 0.5-1.0. After the implementation of low-change investment efficiency is expected to be increased by 1.5 times.