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Saline soil of Yellow River Delta landscaping plant selection and soil improvement measures

Author: XuHui
Tutor: LiFaZeng
School: Shandong Normal University
Course: Botany
Keywords: Yellow River Delta Saline soil Salt-tolerant garden plants Filter Soil improvement measures
CLC: S156.4
Type: Master's thesis
Year: 2007
Downloads: 282
Quote: 5
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Abstract


Yellow River Delta, the Yellow River alluvial soil reclamation land made low altitude in the area, diving bit shallow and high salinity surface easily integrated salt, low vegetation coverage, a single species of green plants, soil salinization and become the urban landscape and ecological environmental construction bottleneck. Soil salinization problem for the Yellow River Delta, the study investigated the ornamental plant resources in the region and its application to screening different saline habitats in the salt-tolerant garden plants, salt-tolerant landscaping plants to adapt to and different soil improvement measures the effect of saline-alkali soil improvement, to provide a practical basis for the Yellow River Delta to create ecological garden city. Investigate different saline habitats in the Yellow River Delta species growth distribution, simultaneous acquisition of 0-20cm ,20-40cm ,40-60cm three soil soil samples measured salt content, the results show that the area of ??saline-alkali soil greening 98 kinds of plants, belonging to 39 families, is now widely cultivated in 68 applications; salt tolerance of plants and ornamental value as an indicator screening evaluation of major saline-alkali soil green plants, the establishment of evaluation system; adopt governance the salt soil improvement measures success Introduced nearly 20 kinds of non-salt-tolerant plants with high ornamental value, rich green plant species. Introduction the planting bead US Begonia plots of different salt content, papaya Begonia, white tattoo Lagenaria, hibiscus, crape myrtle tree species, examine the survival rate and then height growth, the results show that the bead beauty Begonia and white tattoo can be grown in 0.5% of the salt content of the soil, but the Nitraria spent salinity growth is significantly lower; papaya Begonia and hibiscus can be grown in soil salt content of 0.25% -0.35%, which, papaya Begonia higher salt tolerance; Chaenomeles Begonia and crape myrtle in the soil of the salt content of 0.25% growth was inhibited, grow well in the salinity of 0.15%, the salt tolerance of Chaenomeles Begonia slightly stronger than the crape myrtle . Multiple comparisons showed that soil salinity have a significant impact on the growth of tree species, soil salinity is greater than 0.35%, the growth of various species was significantly reduced, but beads beauty Begonia in the salt content of the test soil have good growth performance. Tall fescue seed garden lawn plants using different concentrations of NaCl and mixed salt solution were processed to compare the treatment under the germination rate of the seeds, the initial germination time, germination rate and total germination rate, experiments show that NaCl solution treatment 5.9-17.6g / L intervals and mixed salt solution in the 17.6-35.1g / L range is tall fescue seed germination of salt-sensitive interval, 11.7 g / L of NaCl solution and 23.4g / L mixed salt solution are tall fescue seed germination the sensitive salt concentration. Swapped with different soil textures and the no salt barrier layer greening lots survey of soil salt content determination, to compare the different soil improvement measures the impact of changes in soil salinity, the results show that the replacement of foreign soil clayey loam tree hole tree planting should guarantee appropriate foreign soil more than 60cm thick. Change with clayey loam and with every salt drainage measures, soil salinity will be reduced to below 0.1%, the the soil improvement governance salt effect significantly. The processing of the investigated coating and straw mulching the garden the survival rate of the trees, save rate and shoot growth amount of coverage measures to improve the survival rate, preservation rate significantly affect the survival rate of the coated reforestation, preservation is higher than straw mulching, and early shoot growth laminating significantly higher than the grass covering, but the annual shoot growth was no significant difference after first coating Uenae, in order to improve the survival rate of straw mulching treatment until the rainy season, in order to Lee ventilation and fertility to the soil to promote the growth and development of landscape trees. Yellow River Delta of water conservancy improved, chemically modified, and biological improvement measures have received the Good the improving soil Governance salt effect.

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CLC: > Agricultural Sciences > Agriculture as the foundation of science > Soil > Soil improvement > Improvement of saline-alkali soil
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