Study On Solid Seeding Of Semidwarf Soybean Variety Heihe 29

To investigate the suitable narrow row spacing and compact planting cultivation pattern of semidwarf soybean variety Heihe 29 in the northern area of Heilongjiang province, the paper firstly studied their effect on agronomic character, yield and yield components, lodging degree and diseases and insect pests incidence of narrow-compact planting, both wide and small ridge-narrow row and compact planting. The optimal fertilizer rate and type of narrow-compact planting, as well as yield and income increase rate, fertilizer effect and economic benefit of different chemical fertilizer NPK rate and bio-fertilizer were also studied. The goal is to provide theoretical and practical guidance of narrow row and compact planting cultivation of semidwarf soybean variety Heihe 29 in Heilongjiang province.The experimental results from 2010 to 2011 yearly showed as following:Narrow row and compact planting cultivation pattern field experiment1,Compared cultivation pattern of narrow-compact planting, both wide and small ridge-narrow row and compact planting diseased grains rate with control of the three rows planting on per ridge:the agronomic character of plant height, fresh and dry matter weight, leaf area index and pod-setting height showed increased trend; the lodging degree was more severe with the increase of planting density, especially for high-density treatments of wide ridge-narrow row and compact planting or small diseased grains rate; diseased grains rate was increased with the increase of planting density, but percentage of damaged seeds was opposite; yield and economic benefit was increased more obviously, relatively.2,Compared three narrow row compact planting patterns:the highest yield of semidwarf soybean variety Heihe 29 was found in narrow-compact planting cultivation, however, wide and small ridge-narrow row and compact planting was little difference. Among this three planting cultivations, the highest yield was showed in low row and density treatment of narrow-row compact planting which 15cm row density and 667000 seedlings per hectare, in wide ridge-narrow row and compact planting which 130cm row and moderate density,556000 seedlings per hectare, and in small ridge-narrow row and compact planting which 45cm row and moderate density, 556000 seedlings per hectare.Narrow row spacing and compact planting cultivation fertilizer field experiment1,The highest increase rate both yield and economic was showed in the treatment of 3N1P2K2 (N:37.5, P2O5:90, K2O:82.5kg/hm2) which narrow-compact planting fertilizer experiment based on 15cm row density and 667000 seedlings per hectare.2,The highest increase rate both yield and economic was showed in the treatment of 5 N1P3K2 (N:37.5, P2O5:135, K2O:82.5kg/hm2) which wide ridge-narrow row and compact planting fertilizer experiment based on 130cm row density and 556000 seedlings per hectare.3,The highest highest increase rate both yield and economic was showed in the treatment of 3N1P2K2 (N:37.5, P2O5:90, K2O:82.5kg/hm2) in small ridge-narrow row and compact planting fertilizer experiment based on 45cm row density and 556000 seedlings per hectare.4,The the highest increase rate both yield and economic was showed in the treatment of particles biological phosphate-potassium compound fertilizer in bio-fertilizer experiment based on 130cm row density and 556000 seedlings per hectare.