摘要
为探讨不同氮磷配比对云南松苗木生长及生物量积累的影响。选取云南松苗木作为研究对象,将其分为5个处理组,包括未施肥的对照组A(CK)和4个不同氮磷配比的处理组。分别测量各处理组苗木的苗高、地径以及整株生物量。结果表明:未施肥的对照组A苗高和地径生长量最低,整株生物量也仅为12.24 g/株,显示出氮磷养分缺乏对云南松生长的显著限制作用。处理组B中低水平氮磷施用显著提升了苗木的生长性状,整株生物量较对照组提高了34.02%。处理组D中氮磷配比优化后,苗木的整株生物量达到了最高值20.47 g/株,比对照组提高了67.29%。处理组E中氮磷双方浓度过高时,生物量的增加趋势放缓,甚至出现下降。指出了适当的氮磷施用可以显著促进云南松苗木的生长,特别是在氮素适中而磷素较低的情况下(如处理组D),而过高的氮磷供给会抑制植物的生长。合理配比氮磷营养元素对云南松幼苗的生长和生物量积累具有重要作用,这一发现为林业生产提供了理论指导,有助于制定更有效的施肥策略。
This study aims to explore the effects of different nitrogen phosphorus ratios on the growth and biomass accumulation of Pinus yunnanensis Franch seedlings.Pinus yunnanensis Franch.seedlings were selected as the research object and divided into five treatment groups,including control group A(CK)without fertilization and four treatment groups with different nitrogen phosphorus ratios.The seedling height,ground diameter,and overall biomass of each treatment group were separately measured.The results showed that the control group A without fertilization had the lowest seedling height and diameter growth,and the whole plant biomass was only 12.24 g/plant,indicating a significant limiting effect of nitrogen and phosphorus nutrient deficiency on the growth of Pinus yunnanensis Franch..The application of low levels of nitrogen and phosphorus in treatment group B significantly improved the growth characteristics of seedlings,and the overall biomass of the plant increased by 34.02%compared to the control group.Furthermore,after optimizing the nitrogen phosphorus ratio in treatment group D,the overall biomass of the seedlings reached the highest value of 20.47 g/plant,which was 67.29%higher than the control group.However,when the concentration of nitrogen and phosphorus in treatment group E is too high,the trend of biomass increase slows down or even decreases.Research has confirmed that appropriate nitrogen and phosphorus application can significantly promote the growth of Pinus yunnanensis Franch.seedlings,especially in the case of moderate nitrogen and low phosphorus(such as treatment group D).Excessive nitrogen and phosphorus supply can inhibit plant growth.Therefore,a reasonable ratio of nitrogen and phosphorus nutrients plays an important role in the growth and biomass accumulation of Pinus yunnanensis Franch.seedlings.This discovery provides theoretical guidance for forestry production and helps to develop more effective fertilization strategies.
作者
伏彦平
Fu Yanping(Forestry and Grassland Bureau of Shizong County,Qujing 655700,Yunnan,China)
出处
《绿色科技》
2024年第15期136-139,共4页
Journal of Green Science and Technology
关键词
云南松
氮磷配施
生长状况
生物量
Pinus yunnanensis Franch.
combined application of nitrogen and phosphorus
growth status
biomass
