复合肥和铁元素肥料对四川苏铁生长繁育的影响

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Effects of compound fertilizer and iron element fertilizers on the growth and breeding of Cycasszechuanensis

TANG Yuanhui

（Shaxian Ecological State-owned Forestry Farm， Sanming 365o50， China）

AbstractTo explore theefects ofcompound fertilizers and ironelementfertilizersonthe growthand breeding of Cycas szechuanensis，experimental areas were established in Taojinshan Nature Conservation Communityand Cycas szechuanensis transplant park in ShaxianDistrict，Sanming City，Fujian Province in2O22，withno fertilizationascontrol （CK）.The leaf length，leaf width and leaf numberof theplant were measuredunderdiferent fertilization rates （0.10， 0.25， 0.50， 0.75，1.00 and 1.25kg/plant ）；the effects of adding 95% ferrous sulfate fertilizer to compound fertilizer on leaf growth wereanalyzed.The resultsshowed that there were diferences in the growth of new leaves of Cycas szechuanensiswith diferent amountsofcompoundfertilizer.The length，width and number ofnew leavesapplied compound fertilizer were beter than CK，andthe growthappliedO.5O-O.75 kg/plantcompound fertilizer wasbetter.In the process of fertilization，adding O.1O kg/plant 95 % ferrous sulfate fertilizer can prevent the symptoms of iron deficiency yelowing in new leaves.In conclusion，applying compound fertilizerand adding O.1O kg/plant 95 % ferrous sulfatefertilizer wasbeneficial tothe growthand breeding of Cycas szechuanensis，improvetheliving environmentof its natural community，and protect the natural resources of the plant.This paper providesreferences for the population breeding of Cycas szechuanensis.

Keywords Cycas szechuanensis； fertilization； growth and breeding； population size

四川苏铁（Cycasszechuanensis）属苏铁科（Cycadaceae）苏铁属（Cycas），是庭园观赏植物之一，是濒危国家一级保护植物，其主要分布于四川西部乐山、峨眉山、雅安以及福建闽北等地1。（剩余3740字）