Cau 46 Dao mu, nguyen nhan va bien phap khac phuc?

·   Hien tuong dao mu: La hien tuong tren cac canh mat ngu nhieu khong hinh thanh nu hoa ma chi ton tai nhung la vay kho mau den.

-    Pham vi, muc do: Hien tuong dao mu co the xay ra tren toan bo cay tren 1 so canh hoac tren 1 phan canh, moi 1 muc do co anh huong o muc do khac nhau den chat luong va gia tri thuong pham cua hoa Dao.

-    Tac dong: Hien tuong dao mu la hien tuong k mong muon doi voi nguoi trong hoa no lam giam gia tri thuong pham cua cay hoa dao, giam gia tri tham my, co nhung nam Dao mu gay that thu rat lon doi voi cac ho nong dan trong dao.

·   Nguyen nhan gay ra:

-    Dinh duong cung cap khong day du, can doi: De cay sinh truong va phat trin binh thuong can cung cap day du cho cay ccac yeu to dinh duong NPK neu cung cap khong day du cay se khong co du dinh duong cho qua trinh quang hop, cay tich luy duoc it dinh duong do do khong co du dinh duong cho mam hoa phat trien vi vay ma ma hoa bi lui hoac nguà dao mu khong the hinh thanh nu hoa.

+ Hoac do bon phan khong can doi, nghia la bon ty le cac nto dinh duong ko hop ly do do nguyen to nay se kim ham tac dung va hieu luc cua nguyen to khac: VD bon it K lam giam kha nang van chuyen va dong hoa N va K dod o se lam giam hieu luc cua 2 nguyen to nay anh huong den su hinh thanh nu hoa cua cay.

+ Hoac bon qua nhieu dam kich thich st than la qua manh sinh duong qua manh uc che stst à Dao mu.

-    Bam tia canh khong dung cach:

+ Do trong qua trinh cham soc bam ngon tia canh khong dung cach: Bam qua it hoac khong bam tia canh de cay qua nhieu canh la, canh vo hieu, canh xum xue, lam cho cay bi tieu hao qua nhieu dinh duong chon hung canh vo hieu nay, anh huong den hinh thanh va phan hoa nu hoa. Vi thuong o nhung canh vo hieu ko co kha nang quang hop ko co kha nang hinh thanh nu hoa ma chi co kha nang tieu hao dinh duong cua cay.

+ Hoac tia canh qua nua lam cay thieu S la quang hop, tia mat nhieu canh mang mam hoa cay thieu canh quan hop, thieu dinh duong, cay tro trui do do thieu dinh duong kha nang phan hoa va hinh thanh mam hoa kem, it

-    Cay bi benh chay gom: Gay ach tac con duong van chuyen cac chat dinh duong tu duoi len va yeu cau cac san pham dong hoa tu la xuong, cay stpt yeu, quang hop kem, san pham dong hoa it, cay it kha nang phan hoa va hinh thanh nu hoaà Hien tuong dao mu

-    Dieu kien ngoai canh bat thuan: Do mot so nam dieu kien thoi tiet qua lanh nhiet do xuong duoi 100C hoac nhiet do qua cao 39-400C cay stpt kem, kha nang quanh hop kem coi coc it la, can coi, cay phan hoa mam hoa kem, it hoa nen khong co hoaà Dao mu

+ Hoac do mua qua nhieu, am do qua cao, cay bi ngap ung re khong ho hap hoac ho hap kemà stpt kem anh huong qua trinh hinh thanh va phan hoa mam hoa va phat trien nuà Dao mu.

·   Bien phap khac phuc.

-    Bon phan can doi, hop ly va day du: De cay dao stpt tot phan hoa va hinh thanh nu hoa thuan loi, can phai cung cap cho cay day du va can doi. Bon phan phai kip thoi doi voi tung giai doan sinh truong cua cay de cay co du dinh duong cho stpt.

-    Bam ngon tia canh dung cach va dung thoi gian: Khi bam ngon tia canh phai dung cach: chi tia bi canh lan, canh mot, canh vo hieu de cay thoang va tao kieu dang dep, khong nen bam tia qua muc. Ban tia dung thoi gian den thang 9 am lich khong duoc cat tia nua phai de tu nhien neu cat tia se co hien tuong dao mu.

-    Tac dong cua bien phap thuc va ham dao dung muc: Neu thay dao cham can co bien phap thuc dao: tuoi nuoc, bon phan, phun thuoc kich thich sinh truong ,..de dao nhanh co hoa. Neu thay dao stpt qu muc can co bien phap ham dao hop ly: tuot la, khoanh vo, xen re hoac dung cac chat kim ham st,.. de kim ham su ra hoa ssom cua dao, tuy nhien cac bien phap thuc ham can thuc hien dung cach, dung luc de dem lai hieu qua tot nhat.

Nhung nam gan day khi gap dk thoi tiet bat thuan can co bien phap che chan.