Uyazi kanjani iminyaka yesihlahla?

Izihlahla ziluhlobo lwesitshalo somhlaba esingakhula futhi siphile isikhathi eside ukudlula konke okunye; Ngaphezu kwalokho, kukhona okunye okudlula iminyaka eyi-millennium yempilo, njengama-redwoods, iminqumo noma i-holm oak. Lokhu kubonakala ngokuba nesilinganiso sokukhula kancane, kanye nembali ngemuva kweminyaka embalwa ukuhluma kwembewu.

Kepha uma uya, ngokwesibonelo, enkulisa noma engadini bese ubona leyo oyithandayo, ubungazi ukuthi ungayibala kanjani iminyaka yayo? Awu, akulula ngaphandle kokubala izindandatho zokukhula. Ngakho-ke, ngezansi sizokutshela ungasho kanjani ubudala besihlahla (noma ngabe uyaphila noma cha).

Bala iminyaka yesihlahla ngokubala amasongo aso

Izihlahla, njengezinye izitshalo (nezilwane) zincike kakhulu esimweni sezulu kanye nasezimeni zemvelo. Endabeni yabalingisi bethu abaphambili, lokhu kuyinto ethi kuzobonakala kulokho okwaziwa ngokuthi izindandatho zokukhula: ezinye zilula, ezinye zimnyama; ezinye zijiyile, ezinye zincane.

Yebo, kufanele wazi ukuthi lezo ezilula zakhiwa entwasahlobo, kanti ezimnyama zakwenza ngasekupheleni kwehlobo noma ekuqaleni kwekwindla. Kodwa futhi, indandatho ejiyile isho ukuthi isihlahla sikwazile ukuthola zonke izakhamzimba namanzi ebikudinga ngaleso sikhathi.

Futhi kunokwengeziwe: uma kukhona noma yisiphi isibazi sombala omnyama kakhulu, noma esimnyama imbala, uzokwazi ukuthi ngalowo nyaka isihlahla sasha umlilo (noma sasha).

Ukwazi lokhu, ukubala iminyaka yabo kulula: kusuka maphakathi, kufanele ubale amasongo kunye ngakunye.

Uyazi kanjani iminyaka yesihlahla ngaphandle kokuyisika?

Indlela eshesha kunazo zonke ukuthatha isampula elinokuma okungunxantathu okungaphezulu noma okuncane okuvela esiqwini ngosizo lwe-Pressler drill ukuze likwazi ukubala ukuthi linamasongo amangaki. Kepha okokuqala kubalulekile ukuthi wazi ukuthi kukhona enye indlela, nokuthi ngeke kulimaze isitshalo. Yebo, kungakuthatha isikhashana, nokuthi akunembile njengamasongo, kodwa kusondele impela.

Ukuze wenze lokhu, udinga ukwazi:

• Kungakanani ukuzungezwa kwesiqu (Thatha isilinganiso endaweni ephakeme yemitha elilodwa nohhafu ukusuka emhlabathini).
• Isilinganiso sokukhula esimaphakathi. Akuzona zonke izihlahla ezikhula ngesilinganiso esifanayo: isibonelo, amamephu, izihlahla ze-beech kanye ne-oki zivame ukwanda kumjikelezo wesilinganiso samasentimitha ayi-1,5 ngonyaka. Kepha uma unenkinga yokuyithola, ungabeka u-1,3 uma usola ukuthi ikhula kancane, noma ifinyelela kumasentimitha angu-1,9 uma, ngokuphambene nalokho, ucabanga ukuthi ikhula ngokushesha.

Unakho konke? Manje kufanele ulandele isibonelo sethu: ake sithi sinesihlahla esinobubanzi obulinganisa amasentimitha angama-300.

Isinyathelo esilandelayo hlukanisa umjikelezo ngesilinganiso sokukhula esimaphakathi, okungukuthi: amasentimitha angama-300 ahlukaniswe ngo-1,3 (ngokwesibonelo), okunika: iminyaka engama-236,7, noma engu-237 ukuyizungeza.

Kepha njengoba sisho, akusikho ukubala ngqo. Ngaphezu kofuzo lwesitshalo uqobo, kunezinye izinto okufanele zinakwe: njengesimo sezulu noma ukutholakala kwamanzi nezakhamzimba. Enhlabathini enothe kakhulu futhi evundile, uma amazinga okushisa emancane angakhula ngokwengeziwe futhi abe ngcono kunasendaweni yayo yemvelo, ikakhulukazi lapho inakekelwa engadini.

Ngalo mqondo, nami ngine- I-Pseudobombax ellipticum ukuthi phakathi neminyaka yayo yokuqala ayikaze ikhule nakancane, kepha onyakeni owodwa nje yanikeza ukunwebeka kwamasentimitha angama-80. Yini eguqukile uma iqhathaniswa neminye iminyaka? Yebo, into eyodwa nje impela: ibikhokhwa kaningi kakhulu (ngaphambi kokuthi yenziwe kanye noma kabili kuphela onyakeni wonke, manje isenziwa kanye ngenyanga noma ezinyangeni ezimbili).

Mayelana nokunisela, kwahlala kunjalo (amahlandla ama-3 ngeviki ehlobo, futhi kuncane kakhulu ebusika). Ngakho-ke, ngiyaqiniseka ukuthi ngaphakathi kwayo kunamasongo abanzi okukhula nomthunzi othile onsundu onsundu kunezinye.

Yiziphi izihlahla eziphila isikhathi eside kakhulu?

Uma ufuna ukwazi ezinye zezihlahla ezindala emhlabeni, nansi inketho:

• UPinus longaeva: iphayini ehlala isikhathi eside, isihlanganisi esihlala siluhlaza esihlala ezintabeni zase-United States, sibheke eningizimu-ntshonalanga. Ikhula kancane, ngakho-ke kuyaqabukela ukubona izibonelo ezedlula amamitha ayi-10. Ububanzi bomboko wayo bungafika kumamitha ayi-3,6. Isikhathi sokuphila kwayo siyamangaza, njengoba ingaphila iminyaka engama-5000 XNUMX.
• I-Sequoiadendron giganteum: the i-sequoia enkulu Isihlanganisi esihlala siluhlaza esihlala eSierra Nevada yaseCalifornia. Ifinyelela kubude obumaphakathi obungamamitha angama-50 kuye kwangama-85, futhi inobubanzi obungamamitha ayi-5-7. Isikhathi sokuphila kwayo iminyaka engama-3200.
• I-Sequoia sempervirens: i-evergreen conifer eyaziwa kahle ngegama le-sequoia ebomvu. Itholakala oGwini lwePacific eNyakatho Melika, futhi ifinyelela cishe emamitheni ayi-100, ngesiqu somthamo esingamamitha ayi-7,9. Inesilinganiso seminyaka yokuphila eyi-1200-1800.

Ubucabangani ngalesi sihloko?