Effects Of Ridge On The Growth And Yield Of Potato In Different Straight Line

The extension area of potato ridge double row planting technology is increasing in China,but no perfect supporting machinery. Find the best row spacing which meet the productionrequirements have a very important significance for better guidance mechanized production andimprove economic efficiency. Experiment with “KenShu NO.1”, used a randomized blockdesign, a detailed study on the ridge double row planting with different spacing for potato plantgrowth, dry matter accumulation, yield and component factor.Test results are as follows:(1) With the planting density increasing, plant height, stem diameter, tuber number per plantand tuber weight per plant gradually reduced, the number of main stems per unit area increased,the number of main stem per unit area constituted a significant negative correlation with potatofresh weight per plant and stem diameter, and constituted a very negative correlation with plantheight.(2) Fresh weight and dry weight of aerial part in each row spacing firstly increased and thendecreased with the passage of the sampling period, exhibited parabola change. Dry weight ofaerial part was significantly positively correlated with tuber fresh weight.The first sampling,root dry weight and root fresh weight reached the maximum of all treatments, and graduallydecreased with the passage of the sampling period. Tuber fresh weight gradually increased overthe sampling time. Fresh weight and dry weight of aerial part, fresh weight and dry weight ofunderground part and tuber fresh weight throughout the growing period showed decreased withthe increasing density.(3) In the same row spacing, with decreasing density, the number and weight of small tuberincreased. In contrast, the number and weight of big tuber decreased. tuber number per plantwas7.08at most when row spacing was15cm*15cm, and the average tuber weight was0.073kg at least. When row spacing was15cm*15cm,20cm*15cm,tuber number in total andthe number of small whole potato both constituted a significant difference with other treatment,the big and medium potato both in low level.(4) In the yield components, the proportion of the large potato was the largest, the largepotato is the most important factors that constitute a production. At constant spacing,the rate oflarge potato decreased with the increasing density, and the rate of small potato just the opposite. Treatment that row spacing was20cm*25cm had the highest production, rate of large potatowas69.21%, the proportion of micro-potato was the lowest. Treatment that row spacing was15cm*15cm had the largest rate of small potato, which was26.24%. Treatment that rowspacing was25cm*15cm had the largest rate of medium potato, which was22.71%. Rate ofsmall and medium potato at different row spacing exhibited distinct differences.(5) Row spacing of15cm*15cm had the highest yield among all treatments, reached33013kg/hm2, and the number of small tuber was largest,which is4.53per plant, the number ofpotato was45.05per square meter. Treatment that row spacing was20cm*25cm had the largestrate of big and medium potato, reached84.66%. Treatment that row spacing was25cm*15cm,the production and rate of big and medium potato were both relatively high, reached30945kg/hm2,80.87%respectively.