论文部分内容阅读
设置4个基质配方开展西南桦漂浮育苗基质选择试验,测定各基质的理化性质以及苗木的生长表现、光合色素含量等指标并进行分析比较,旨在筛选出合适的漂浮育苗基质。结果表明:(1)基质容重随着轻基质与黄心土配比(体积比)的增大而减小,其持水量和各化学性质指标则呈递增趋势,4种参试基质间各项理化性质指标均差异极显著(P<0.01);(2)基质Ⅱ和Ⅲ的轻基质和黄心土配比分别为2∶3和1∶1,其各项理化性质指标处于中间水平,尤其是容重、持水量适中,其育苗效果最好;(3)基质Ⅱ和Ⅲ处理的西南桦幼苗高、地径、生物量以及光合色素均极显著高于其他基质(P<0.01)。因此,本研究筛选出基质Ⅱ(松树皮24%+沤制锯末8%+炭化锯末8%+黄心土60%)和Ⅲ(松树皮30%+沤制锯末10%+炭化锯末10%+黄心土50%)适合西南桦漂浮育苗,为进一步研发其漂浮育苗关键技术奠定了基础。
Four matrix formulations were set up to carry out the matrix selection test of the floating seedlings of Betula alnoides. The physical and chemical properties of each matrix, the growth performance of seedlings, photosynthetic pigment content and other indicators were determined and compared to screen suitable floating seedling substrate. The results showed that: (1) The bulk density decreased with the increase of the ratio (volume ratio) of light medium to yellow heart soil, and the water holding capacity and the chemical indicators showed an increasing trend. The physical and chemical properties (P <0.01). (2) The ratio of light medium and yellow heart soil of matrix Ⅱ and Ⅲ were 2: 3 and 1: 1, respectively. The indexes of physicochemical properties were at the intermediate level, especially the bulk density, The medium amount of water had the best nursery effect. (3) The height, diameter, biomass and photosynthetic pigment of Betula platyphylla treated with substrates Ⅱ and Ⅲ were significantly higher than those of other substrates (P <0.01). Therefore, in this study, we selected two types of matrix Ⅱ (pine bark 24% + 沤 sawdust 8% + charred sawdust 8% + yellow heart soil 60%) and Ⅲ (pine bark 30% + 沤 sawdust 10% + charred sawdust 10% %) Is suitable for floating breeding of Betula alnoides, which lays the foundation for further research on the key technology of floating seedling.