基质及缓释肥和激素处理对云南松苗木生物量的影响

采用U₁₅^*（15⁸）均匀设计的变形U₁₅^*（5⁸）进行苗木培育试验，研究了解基质、缓释肥、GA₃和IAA因素水平及其组合对云南松苗木生物量积累和含水率的影响。结果表明：苗龄165 d时，苗木的平均生物量和含水率分别为0.100 2～0.196 3 g/株、69.8%～76.3%，不同处理组合间此2指标均呈现极显著的差异，CK的生物量和含水率极显著低于其他处理组合或为最小的；缓释肥种类是影响此2指标的主导因子，且生物量最高和含水率较高的处理组合所追施的缓释肥均为奥绿颗粒缓释肥5^#；影响针叶、茎和根生物量以及含水率的主导因子不完全相同，缓释肥和GA₃分别是影响针叶及根生物量积累和提高含水率的主导因子，基质和缓释肥则是影响茎生物量和含水率的主导因子；综合最优处理组合为0.15 g/L的IAA浸种后播种于V（森林土）∶V（腐殖土）=3∶1的混合基质中，并施1.0 g/容器（2株/容器）缓释肥5^#，即生产中可采用此处理组合的方式进行壮苗培育。苗木全株生物量和含水率与因素水平间呈现Y=0.160+0.003x₁+0.007x₂−0.008x₃−0.004x₄和Y=72.742+0.158x₁+0.135x₂+0.331x₃−0.705x₄的线性关系。针叶、茎、根的生物量与含水率分别占全株的69.2%、19.4%和11.4%与74.6%、19.4%和6.0%。云南松苗木生物量对根系生长发育的响应较生长量敏感，苗木生物量积累对肥料种类具有选择性，肥效相对较长而缓慢释放的缓释肥有利于其生物量积累和提高器官含水率。

Effects of Substrate and Slow Release Fertilizer Involved Hormone Treatment on the Biomass of Pinus yunnanensis Seedlings

In order to understand the effects of substrate, slow-release fertilizer (SRF), gibberllic acid (GA3) and naphthalene acetic acid (IAA) on the biomass accumulation and water contents of Pinus yunnanensis seedlings, the U15*(58) which deformed from the U15*(158) uniform design was implemented the experiment. The findings indicated that mean biomass and water contents were 0.100 2−0.196 3 g/seedling and 69.8%−76.3% for 165-day-old seedlings, respectively, and there were significant differences of which the 2 parameters among the treatment combinations, the biomass and water content of the control presented significantly lower than or the smallest of which the other TCs. The SRF type was the dominant factor affecting the biomass and water contents, while the TC of the maximum biomass and the highest water content was fertilized the Aolü 5 (A5) granule SRF and SRF 5#. The dominant factors affecting the biomass and water content of needles, stems and roots were not identical, with the SRF and GA3 were the dominant factors affecting the biomass accumulation and increasing the water contents of the needles and roots, while the dominant factors influencing the which of the stem were the substrate and the SRF, respectively. The comprehensive optimal TC was the 0.15 g/L IAA solution pre-soaked the seed then sown it in the mixed substrate of 3 forest soils and 1 humus soil, and applied 1.0 g/container (2 seedlings/container) the SRF 5#, in terms of this TC approach could raise sound seedlings in the practice. There was a linear relationship between the biomass and water content of whole seedling with the factorial levels Y=0.160+0.003x1+0.007x2−0.008x3−0.004x4 and Y=72.742+0.158x1+0.135x2+0.331x3−0.705x4, respectively. The biomass and water content of needles, stems and roots accounted for 69.2%, 19.4% and 11.4% and 74.6%, 19.4% and 6.0% which composited the whole seedling, respectively. The response of the biomass of P. yunnanensis seedling to root growth and development was more sensitive than that of growth parameters, and the accumulation of seedling biomass was selective to fertilizer types. The SRF with relatively long fertilizer effect was beneficial to the biomass accumulation and the water content increase of the organs.