本研究分析不同密度可降解防草布(低密度:52 g·m-2;中密度:72 g·m-2;高密度:82 g·m-2)对幼树生长及土壤性质的影响，旨在为柑橘幼树果园如何选择可降解防草布提供参考。结果表明，与对照相比，低密度和中密度可降解防草布对植株地上部分生长、根系在不同土层深度的分布比例均无显著性影响，但能造成根系总数量发生显著性减少。高密度可降解防草布能显著促进植株地上部分生长，不会引起根系总数量减少，但易造成根系分布在浅土层(0～<20 cm 土层深度)。3 种防草布对土壤容重无显著性影响，但能造成表层土壤含水量增加和深层土壤含水量减少，这可能是根系分布在浅土层的原因之一。因此，建议柑橘幼树果园选择高密度可降解防草布覆盖，但应考虑防草布覆盖前进行深层土壤改良，避免根系上浮。
Effects of different densities of degradable ground cloth on growth and soil properties of citrus sapling
This study analyzed the effects of different densities(low density:52 g·m-2;medium density:72 g·m-2;high density:82 g·m-2)of degradable ground cloth on the growth and soil properties of citrus saplings with the aim of providing guidance on selecting suitable degradable ground cloth for citrus orchards.Results showed that low and medium density degradable ground cloth had no significant impact on above-ground plant growth or root distribution ratio at different soil depths but significantly reduced the total number of roots compared with the control treatment.In contrast,high-density degradable ground cloth significantly improved above-ground plant growth without decreasing the total number of roots but led to roots tending to be distributed in shallow soil layers(0-<20 cm depth).The three types of ground cloth didn't significantly affect soil bulk density,but increased water content in topsoil and decreased it in deep soil,which may have played a role in root distribution.Consequently,the study suggested using high-density degradable ground cloth in citrus orchards.Meanwhile,it was important that deep soil improvement should be conducted before covering the ground cloth to prevent root floating.
ground cloth mulchingcitrussoil propertiesgrowthroot system
万方数据
维普
