III. Kit qua diio tao can bo va tap huin cho nong dan tham gia san xult
1. NGUON GOC CUA GI6NG
Giflng liia Huwng com la giflng lua tham thuin do PGS.TS. Nguyen Thj
Tram va cac cdng tac vifn Vifn Sinh hgc Ndng nghifp, DHNN Hd Nfli lai tao chgn Igc va dua ra san xuat. Gidng Huemg cflm dugc chgn tir td hgp lai: Huong I25S/ MR365//TX93/// Maogd////R9311.
- Thdi gian sinh trudng vu xuan: 145-160 ngdy, vy mua 125-130 ngdy. - Chieu cao cay; 95-105 cm, than map. Id tflng diy, xanh dam, la ddng to dai diing, kilu cay tham canh, siic de nhanh trung binh kem, kifu de nhanh hoi xoe. - Nang suit trung binh 5-6 tin/ha/vy, cao nhdt 7,5 tan/ha/vy, bdng to, hat to dai vang ram, md hat thang, cd rau tefn hat dau bflng.
- (jao teong, ty If bac byng rit tiilp, ty If gao xdt 68-69%, gao nguyfn 60-70%,
ham lugng amyloza 11-12%, prfltf in 7,7%, nhift dfl hoa hfl tii^, com ngoa: deo
dam, bdng, tham nhe mui cdm mdi.
- Giflng cam fln nfn cd thf gieo ciy dugc ca 2 vy xuan va mita.
- Dac diim ehflng chju: ehflng dfl rit tflt, chiu lanh ylu d tiidi ky ma, nhiem nhe din tiimg binh bfnh khfl vin, bac la, dao fln.
2 . s a D 6 C H Q N L Q C
- Vu 1 (GO): Gieo hat giflng Huong cflm vdi difn tich la 1.000 m', cay 1 ddnh, ciy tiiua vdi khoang each 20xl5cm. Trong cac giai doan phat teifn cua giflng (giai doan de nhanh ro, giai doan diing cai lam ddng, giai doan tefl) cln quan sat timg ca till. Chgn cac ca till sinh teudng, phat teiln tflt, khflng bi nhifm bfnh, dac biet la phai cd cdc tinh teang vf kilu hinh giflng Huong cflm nguyfn ban. Ngoai ra, phai ddnh gia mid tiiom tefn la va ngi nhu cua timg ca titf d cac
giai doan de nhdnh rg, tefl bflng va nOi nhu, loai bd cd flif xiu, hi bfnh hai hoac mui tham khdng dat yfu cau.
- Vu 2(GI): Gieo va danh gia cac cd thf chgn lge dugc d the he GO. Gieo rifng timg ca till, moi cd till gieo rifng timg bdng, cae bong trong mft cd thi ggi la I ddng. Theo doi, danh gia dac diem sinh trudng, dac difm hinh thdi, kha nang chdng chiu sau bfnh hai va diiu kifn ngoai cdnh, bilu hifn miti thom tefn la va ngi nhQ. Chgn cac ddng tot, kifu hinh diing nguyfn ban, mill thom tefn la va ngi nhQ dat 100% cdc cay trong ddng tham (difm 2).
- Vu 3 (G2); Gieo cay cac ddng dugc chgn Igc d thf hf Gl thanh cdc ddng rieng bift. Theo ddi, ddnh gid ddc difm sinh teudng, dac diim hinh thdi, khd ndng chdng chiu sau bfnh hai va difu kifn ngoai cdnh, bieu hifn mui thom tefn la va ngi nhQ. Cdc ddng cd tinh trang ddng nhdt vf kifu hinh dugc hfln thanh 1 lfl hat sieu nguyfn chung.
D I duy tri tinh thom phai kifm tra sdm miti thom tren Id; Chuan bi dng nghiem cd nut va hod chit KOH 1,0%. Cit 3 la tefn mdi cay dugc chgn, cat nhd rfli cho vao flng nghifm sau dd dd tilp 10 ml dung dich KOH 1,0%, day
niit, sau 10 phut, md mit dng nghifm S ngui lln fast, cd thf cd miii tiiom giu
lai, loai bd nhirng ca till tiiom nhe va khflng tiiom. Ddnh gid tiiom tefn Id d cac giai doan ma, de nhanh rfl, tro bdng. Khi lua chin tiiu rifng cd thf cdn que, deo tilf, danh sd tiiu tu, dem vl phdng do dim, quan sat ddnh gid, loai bd ca till khflng dat yeu clu. Phai rifng ca till dugc chgn, khi khd, bdc mdi ca tilf 30 hat, nghiln teong cfli sii, bfl vao flng nghifm, dfl vao mfli flng 10 ml KOH 1,7% day mit va dl teong tu dinh fln d 50''C trong 10 phiit, md lin lugt timg flng dl ngiii, flng nao khflng thom thi loai bd ca the tuong iing.