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本文对混种大豆的落叶松.大豆、水曲柳-大豆复合生态系统土壤理化性质进行研究。结果表明,在一个生长季内混种后的土壤物理性质得到了改善。落叶松.大豆与水曲柳一大豆复合生态系统的土壤容重为1.112g/cm3和1.058g/cm3均低于相对应的纯林:混种大豆后土壤总孔隙度增加。两种林-豆复合生态系统土壤有机质分别比对应纯林高1.77倍和1.09倍:落叶松一大豆复合生态系统全氮和水解氮含量分别高于落叶松纯林4.2%和53.0/%,水曲柳-大豆复合生态系统全氮和水解氮含量分别高于水曲柳纯林75.5%和3.3%:混种大豆后全磷含量降低,而有效磷含量则增加:落叶松-大豆复合生态系统全钾和有效钾比落叶松纯林高0.6%和17.5%,水曲柳-大豆复合生态系统全钾和有效钾分别比水曲柳纯林高56.4%和21.8%。图1表3参27。
In this paper, the soil physical and chemical properties of the mixed soybean larch, soybean, Fraxinus mandshurica - soybean composite ecosystem were studied. The results showed that the physical properties of the soils mixed after one growing season have been improved. Larch.The soil bulk density of soybean and ash-soybean mixed ecosystem was 1.112g / cm3 and 1.058g / cm3, respectively, lower than that of the corresponding pure forest: the total soil porosity increased after mixed soybean. Soil organic matter in the two kinds of forest-soybean complex ecosystems were 1.77 times and 1.09 times higher than the corresponding pure forest respectively. The contents of total nitrogen and hydrolyzed nitrogen in the larch-soybean composite ecosystem were higher than 4.2% and 53.0% respectively, The contents of total nitrogen and hydrolyzed nitrogen in the manure-soybean composite ecosystem were 75.5% and 3.3% higher than those in the pure manchurian ash plantation, respectively: the total phosphorus content decreased and the available phosphorus content increased after mixed soybean: total potassium And available potassium were 0.6% and 17.5% higher than that of pure pure forest of Larch, respectively. Total potassium and available potassium were higher by 56.4% and 21.8% than that of pure pure water of Fraxinus mandshurica-soybean complex ecosystem respectively. Figure 1 Table 3 Reference 27.