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通过大田试验,对比研究了广东新会滩涂围垦地柑桔与花生间作、柑桔与生姜间作、柑桔单作、花生单作、生姜单作5种种植模式对根区土壤速效养分等性质的影响。结果表明:(1)5种种植模式的根区土壤pH出现分化,柑桔/花生和柑桔/生姜模式表现出极显著下降,其中以柑桔/花生间作模式的根区土壤pH最低;(2)种植7个月后柑桔/花生和柑桔/生姜两种间作模式的根区土壤速效氮含量显著高于生姜和花生单种的根区土壤速效氮含量,而两种间作模式的根区土壤速效氮含量之间无显著差异,5种种植模式的土壤速效氮含量均显著上升;(3)种植7个月后,柑桔单作的根区土壤速效磷含量明显高于柑桔/花生、柑桔/生姜以及单作花生的根区土壤速效磷含量,柑桔/生姜和柑桔/花生两种间作模式的根区土壤速效磷含量和花生单种、生姜单种之间无显著差异;(4)种植7个月后柑桔/生姜的根区土壤速效钾含量显著高于柑桔单种的根区土壤速效钾含量,桔/生姜和柑桔/花生间作模式的根区土壤速效钾含量之间无显著差异,桔/花生根区的土壤速效钾含量在种植期间显著上升;(5)5种种植模式的根区土壤有机质含量均无显著差异和时间变化。由此可见,柑桔与其他作物间作对土壤速效氮、钾等养分的转化和维持有促进作用,因而值得在该地区果园推广应用。
Field experiments were conducted to compare the effects of five planting modes of citrus and peanut intercropping, citrus and ginger intercropping, monoculture of citrus, peanut monocropping and ginger monoculture on the reclaimed land of reclaimed land in Tanushin, Guangdong Province. influences. The results showed that: (1) The pH of the root zone of the five planting patterns differed significantly, and the citrus / peanut and citrus / ginger patterns showed a very significant decrease. The citrus / peanut intercropping system had the lowest pH in the root zone soil. 2) After 7 months of planting, the contents of available nitrogen in the root zone of citrus / peanut and citrus / ginger were significantly higher than those of single root zone of ginger and peanut. However, There was no significant difference between the available and available N contents in the soil, and the contents of available nitrogen in the five planting modes increased significantly. (3) After 7 months of planting, the content of available phosphorus in the root zone of monoculture was significantly higher than that of citrus / The content of available P in root zone soil of peanut, citrus / ginger and monoculture peanut, the content of available phosphorus in root zone soil of citrus / ginger and citrus / peanut were not significantly different from those of single peanut and ginger (4) After 7 months of planting, the contents of available potassium in the root zone of citrus / ginger were significantly higher than those in the single root zone of citrus and the root zone soil of orange / ginger and citrus / peanut intercropping modes Available potassium content between no significant difference, orange / peanut root zone of soil available potassium content in (5) There was no significant difference and time variation of soil organic matter content in the root zone of five planting patterns. It can be seen that the intercropping of citrus and other crops can promote the conversion and maintenance of available nitrogen, potassium and other nutrients in soil, which is worth popularizing and applying in orchards in the area.