摘要
比较了5种刺激割胶制度对RRIM600橡胶树胶乳总固形物(TS)中4种矿质养分(N、P、K、Mg)的影响。结果表明:s/2d/2、s/2d/3+ET、(s/4↑+s/4)d/4+ET、(s/4↑+s/4)d/5+ET、(s/4↑+s/4)d/6+ET等割制下,TS中的4种矿质养分含量均为10月的大于8月的;每生产1kg干胶随胶乳流失的总矿质养分,d/2、d/3及阴阳双线割制中d/6的阳刀三者之间差异不大,其余割制则不论是阴刀还是阳刀都明显大于d/2和d/3;5种割制流失的单一矿质养分都是N、K明显多于P、Mg。阴阳双线割制中阳刀长流胶带走的矿质养分明显大于阴刀,主要是由于阳刀长流胶钾的流失明显增加;(s/4↑+s/4)d/4+ET割制的高刀产、高株产,是以养分的大量损失为代价的。
Five tapping systems were compared to observe their effects on four mineral nutrient elements, i,e. nitrogen, phosphorus, potassium and magnesium, of the total solids in the latex of RRIM600. The results showed that the content of nitrogen, potassium, phosphorus and magnesium of total solids in the latex was higher in October than in August under tapping systems of s/2 d/2, s/2 d/3 ＋ ET, （s/4 ↑ ＋ s/4） d/4 ＋ ET, （s/4 ↑ ＋ s/4） d/5 ＋ ET and （s/4 ↑ ＋ s/4） d/6 ＋ ET. The loss of total mineral nutrient elements from 1 kg of dry rubber were not remarkably different under d/2, d/3 and s/4 d/6, but higher under （s/4 ↑ ＋ s/4） d/4 ＋ ET, （s/4 ↑ ＋ s/4） d/5 ＋ ET, and s/4 ↑ d/6 ＋ ET than under d/2 and d/3. The loss of nitrogen and potassium was higher than that of phosphorus and magnesium under these 5 tapping systems. The loss of mineral nutrient elements in the late drip latex under downward tapping was more significant than that under upward tapping due to increasing loss of potassium. For the tapping system of （s/4 ↑ ＋ s/4） d/4 ＋ ET, high yield per tapping and per plant resulted from high loss of mineral nutrients.
出处
《热带农业科学》
2006年第1期1-4,24,共5页
Chinese Journal of Tropical Agriculture
基金
中国热带农业科学院基金资助项目。
关键词
巴西橡胶树
刺激割制
乙烯利(ET)
总固形物(TS)
矿质养分
rubber tree
Hevea brasiliensis （Willd. ex A. Juss.） Muell.-Arg.
stimulated tapping system
ethephon
total solids
mineral nutrient
