摘要
通过西蒙得木各试种点(区)土壤重要物理性状的测定,结合盆栽试验、田间植株根系及显微解剖的对比研究,结果表明土壤粒级小于0.005mm的含量在紧实土中超过15%,疏松土中超过30%;紧实而粘粒少的土壤含水量超过25%,疏松土壤中超过32%,旱季低于2.5%,是导致西蒙得木根系发育不良,生势衰弱,诱致病原菌侵染,从而导致植株枯萎的主要原因。1990年对各试区的全面调查,其生势表现与试验结果完全一致,2001年对残存植株跟踪调查结果,亦证实了这项研究成果完全准确。
In this paper, several soil physical factors which caused the deterioration of Simmondsia chinensis were mentioned. The results showed that the conclusion of this experiment was in accordance with the fact through investigation in test field in 1990.
出处
《热带农业科技》
2008年第1期27-32,F0003,共7页
Tropical Agricultural Science & Technology
关键词
西蒙得木
土壤粒级
土壤含水量
根系显微解剖
根系发育
Simmondsia chinensis
soil particle
water content in soil
microscope analysis of root system
root system＇s growing
