摘要
覆盖可使南方红壤坡地桔园冬季土温提高0.9℃～2.1℃,地表温度提高1.5℃～3.1℃,春季地膜覆盖使桔园土温回升快,夏季在某种程度上降低了桔园土温。桔园土壤含水量增加0.3%～3.4%。使柑桔耐受干旱危害的时间延缓4d～10d。稻草覆盖和草加膜覆盖可增加土壤有机质和各种营养元素含量,地膜覆盖提高了土壤中N、P、K等营养元素的有效性。覆盖还可以降低土壤容重和比重,增加土壤孔隙度,有效地改善土壤物理性状。覆盖可促进柑桔营养生长,提高座果率和单株结果数,并增大果实体积,从而提高柑桔产量和品质。无灌溉条件下红壤坡地桔园以采用草加膜覆盖最佳,其次是地膜覆盖;有灌溉条件下稻草覆盖效果更好。
The soil temperature and soil surface temperature increase 0.9℃～2.0℃ and 1.5℃～3.1℃ in winter, respectively; the soil temperature rise quickly in spring and decrease a little in summer, and the soil moisture content increase 0.3%～3.4% in citrus orchard with mulching in comparison with control. The contents of organic matter and mineral nutrients in the soil with straw mulching and film-straw mulching increase respectively; the effectiveness of mineral nutrients in the soil with film mulching is higher than that of in control. The volume weight decrease and the porosity increase in the soil with mulching in comparison with control. And the content of nutrient elements in citrus tree, rate of fruit-set, yield and fruit quality in the orchard with mulching are higher than that of with control.
出处
《资源科学》
CSCD
北大核心
1998年第S1期56-65,共10页
Resources Science
