KHOA HOC - CONG NGHE KET QUA NGHIEN CllU, THIET KE, CHE TAO MAY GIEO NGO THEO PHirONG PHAP LAM DAT TOI THIEU Tran Din: Tuan ' Le Kliu Tntwtg ' Sgii\vn Xttcin Bien' Tong Vun Anh' TOMTAT Mltv gieo ttgo theo phinmgpluip liim Hut toi titieii GNTT-0.25 ru clct too ctteit kien tititun hri ltd trtr thiic iftiypliut tri^n iun xiicjl nong nghiep buo ton bl'n vimg a imc/c tu Diem fclwc hiet citu inuy GNTT-0.25.10 vtji nliimg iiiuv gieo khctc lit may ct) the gieo ngo trirc tiep a itieit kien kboiig cun linn nho cfiil trtrt/c May co nUttg sitdt 0.25 ha/h may gieo hiing khoung cdch giira cue hitiig 65 cm khoung citch khom 2fi cm ty /p iol khon, < 3%: Muy lien hap vdi mdy keo coitg sni^t 25-35 HP thong qua cy cdn tVtein treo Tir khoii: Mdy gieo ngo turn dut toi thieu tiong ngltiep hda tdn RESULT OF RESEARCH DESIGN MANUFACTURE OF MAIZE SEEDING-MACHINE FOLLOW MINIMUM TILLAGE METHOD Tran Due Tuan ', Le Kha Truong ^, Nguyen Xuan Bien Tong Van Anh^ SUMMARY Prototype maize seeding-machine follow minimum tillage method (GNTT-0.25) will be well condition support for development Conservation Agriculture in Vietnam Best difference of GNTT-0,25 machine when compare with another seed drills machine is GNTT-0,25 machine don't need soil tillage before sowing the seed GNTT-0.25 machine will be done limit tillage and direct sowing seed together in one time operation; GNTT-0.25 machine attach with tractor by three point linkage, capacity of tractor is 25-^35 Hp Specifications of GNTT-0,25 machine: Capacity: 0,25 ha/h; Number of row: rows: Distance between rows: 65 cm; Distance between planter: 25-^30 cm Missing seed: < 3%; Keywords: maize seeding- machine, minimum tillage, conservation agriculture I BAT VAN OE Viet Nam, ngo la cay lucmg thtrc quan trpng thir hai sau cay lija va la cay mSu quan trpng nha, dupe tr6ng o nhi6u viing khac nhau, da dang ve miia vu gieo tr6ng va he thong canh tac San xuat ngo ca niroc qua cac nam khong ngirng tang \ t- dien tich, nang sudt, san lupng So vcri cac nuoc thi nang suat ngo ty nuoc ta van thupc Ipai kha thSp, san lupng van chua dap img dirge nhu cau san xuflt thiic an chan nuoi nuoc, hang nSm phai nhap khdu 1-1,5 trieu tdn ngo d5 phuc \ 11 chJ biSn thirc an chan nuoi, [ ] Bk bit ddp luong ngo thiiu hut do, cdn ap dung cac bien phap kx thuat tien t i k vao phuc vu san sudt nhu gj6ng moi, phan bon va img ' ThS Vien Ca dien nong nghiep & Cong nghe STH - KS Vien Co dien nonsi nghiep & Conn nghe STH 'KS Vien Co dien nong nghiep &C6nJ nghe STH ' KS Vien Co dien nong nghiep & Cong nghe STH thuat de nghien cinj cho may gieo ngo theo phuang phap lam dat toi thieu gom bg phan lam viec chinh: bg phan lam nho dat va bg phan gieo hat So dh ngu\en ly cdu tao the hien tren hinh Hinh J Sa dd nguyen ly mdy gieo ngo theo phinmg phdp ldm ddt toi ihieu C^lm bo phan phay Cym b^) ph;in gn:o Bg phan lam nho dat cue bg tai cho gieo hat theo nguyen ly phay chii dgng, dugc lap a phia truoc Phay dugc truyen chuyen dgng tir true thu cong suat cua may keo Tren ciia phay CO cum luai phay (co the lap nhieu han), moi cum lual phay co be rgng iam viec 150^250mm sau phay tir 120-^150mm Khoang each giira cac cum luai phay tuong img bang khoang each giira hang ngo May co be rgng lam viec 1.2^1,6m Bg phan lam nho dat cue bg phai lam dugc 80% lugng dat nho tir 3^5 cm Bg phan gieo hat dugc lap phia sau bg phan pha\ va lam viec theo nguyen ly gieo dia true nghieng; so hang gieo la 3, sau gieo 3-^5 cm Bg phan gieo dugc truyen chuyen dgng tir banh tua dong May dugc lien hgp vai may keo co cong suk 30-35 HP 3.1.2 Tinh loan hp phgn Idm nhd ddt - Tinh chl so dpng hoc ci'ia luai phay X Cac thong so cho truoc: So vong quay cua true thu cong su4t may keo: ni = 540 (v/ph); so vong quay ciia tr6ng phay: n? = 270 (v/ph); duong kinh tr6ng phay: