摘要
对受１９９１年７一８月两次强台风袭击表观上无严重受害症状（一级风害）而照常采胶的７０株第５一６割龄的ＰＲ１０７胶树进行了生理状况研究。结果表明，风力胁迫后，无论表现排胶相对正常与否的胶树，其产量和排胶状态、胶乳性状，乳管代谢强度和抗氧化等生理状况均比受害前年度同期的水平差。本例风害树的排胶线不连续并变窄，冬休和停割效果不明显；其严重度与排胶初速度、乳管堵塞指数、胶乳干胶含量、硫醇和无机磷含量显著相关，这与典型死皮树的生理状况相似。风害次年树干出现裂口证明风力胁迫使一部分产胶机构受到不可逆的损害。因此，当胶树受台风较轻危害时，必须采取保护措施。
The physiological status of 70 trees of clone PR107 lashed twice by typhoons during Julyand August,1991 was studied when they were at their 5一6th year of tapping on s/2 d/2system. Being without apparent symptoms of severe damage, the trees in question were stillsubject to exploitation as usual although their leaves were lacerated and some twigs broken.Analyses of 7 physiological parameters in relation to latex regeneration and latex flow on in-dividual tree basis for two consecutive vears showed that wind stress handicapped the treeswith either apparent normal or abnormal latex flow in their yield,latex flow pattern,latexproperties,metabolic activity of laticiferous cells and antioxidation ability,as compared withthe same period in the year before typhoon whipping. The abnormality of latex flow on themildly wind-damaged trees was characterised by discontinuous and narrower flow along afresh cut,and negligible effects of winter rest and stoppage.This abnormal phenomenonwas found closely correlated with the initial flow rate(IFR),plugging index(PI),dry rubbercontent(DRC),and the levels of thiol(R-SH) and inorganic phosphorus (Pi) in latex. Thisis similar to the physiological characteristics of typical dry trees. In fact, wind stress hasbrought about an irreversible damage to part of the laticiferous system as observed in the sec-ond year of wind damage. In this context, rubber trees suffered from minor injury from ty-phoons should give adequate protection for better tree health and latex regeneration capbilityin a long run.
出处
《热带作物学报》
CSCD
1995年第1期17-28,共12页
Chinese Journal of Tropical Crops
基金
国家自然科学基金
关键词
巴西橡胶树
台风
排胶
胶乳再生
橡胶树
Hevea brasiliensis typhoon wind-damage latexflow latex regeneration
