Cau 41 Yeu cau cua hoa dao doi voi dieu kien ngoai canh

·   Nhiet do: Cay dao co nguon goc tu TQ, Mong Co, duoc trong nhieu o cac nuoc on doi va can nhiet doi vi ay cay dao co pho thch ung voi nhiet do kha rong 10-390C. Cay sinh truong va phat trien tot nhat o 18-220C . Nhiet do >400C cay st va hap thu dinh duong giam, giam hieu suat quang hop, nhiet do cao keo dai cay heo chet. Nhiet do thap <5-70C cay sinh truong khong thuan loi va bi coi coc, it loc, it hoa. Vi vay khi trong Dao can chu y lua chon vung sinh thai thuan loi co khoang nhiet do thich hop nhat cho dao phat trien. O nuoc ta cac vung sinh thai phu hop co the trong Dao la: Ha Noi, Hai Dung, Hung Yen, Lang Son,..

·   Anh sang: Ias cho Dao stpt thuan loi la 10000-12000lux. Thoi gian chieu sang toi thieu 6-8h/ ngay. Neu cuong do chieu sang qua manh hay qua yeu deu anh huong khong tot den quang hop cua cay, anh huong den sinh trong phat trien cua cayà Cay se ra it la, it loc va it hoa lam giam chat luong hang hoa cua Dao. AS con anh huong den mau sac cua Hoa, du as hoa co mau sac dac trung cua giong mau tuoi va dep.

·   Am do va luong mua:

Cay dao yeu cau luong mua trung binh 1400-1500mm/nam

Do am khong khi la 80-85%, do am dat 60-70%

O cac thoi ki st khac nhau dao yeu cau ve am do khac nhau: Thoi ki cay con bo re chua phat trien yeu cau anh sang cao hon, do am kk 88%, do am dat 80-85% neu giai doan nay am do dat qua thap cay khong hut du nuoc phuc vu cho sinh truong cco the bi coi coc hoac bi chet, nen neu thieu nuoc can bo xung kip thoi.

Thoi ky ghep am do kk 80-85%, am do dat 70%. Neu nhiet do qua cao dat bi, cay thieu O2 de ho hap giam kha nang hut nuoc va dinh duong cung cap cho cay cay coi coc. Neu nhiet do cao, am do kk cao la moi truong rat thuan loi choc ac loai sau, nam moc, vi khuan hoat dong va gay benh cho dao.

·   Dat: Dao yeu cau dat tot thong thoang nhieu mun dat co cau tuong tot co kha nang giu nuoc va thoat nuoc tot, tang canh tac day. Dat co nhieu nang, PH thich hop 5-8. De dam bao cho su stpt cua dao tot yeu cau dat phai co day du cac nguyen to da luong (N,P,K), cac nguyen to trung luong va vi luong de dao co nang suat cao va chat luong tot. Neu thieu can phai bo xung cho kip thoi day du va can doi cac nguyen to dinh duong de cay stpt tot.