Different Hybrid Rice Varieties Is Machine Planting Preliminary Study On The Adaptability Of In Lezhi County

In order to select high quality and high yielding rice varieties suitable for transplanting in this region,18 hybrid rice varieties were planted in Tiangongtang village,Shituan Town,Lezhi county in 2017.The growth period,seedling quality,transplanting quality,dry matter accumulation and transformation,yield and yield composition,and rice quality characteristics of different varieties were studied.The main results are as follows:1.There were significant differences in rice seedling quality and transplanting quality,seedling height,leaf age,stem diameter,seedling density,and other indicators during the transplanting period,The height of rice seedling is 13.99～22.08 cm,and the density of seedling block is 0.87～1.60 seedling/cm2.There was a positive correlation between seedling height,injury rate and missed transplanting rate and a positive correlation between seedling density and basic seedlings.There were higher significant differences in the rate of leakage and basic seedlings of different varieties.The seedlings of jingliangyouhuazhan,C liangyouhuazhan,Yliangyou1hao,and Shuyou 217 were relatively low in height,high in seedling quality,relatively low in missed transplanting rate and damaged seedling rate,and relatively high in basic seedling of transplanting hole.2.Also,there were significant variations among the yield of the various varieties,with the range of8550～10631.25 kg/hm~2.C liangyouhuazhan,Rong18you 1105,Yixiangyou 800,Jingyouhuazhen,Yixiang 37 had relatively higher yield compared with other varieties.Moreover,the yields were positively correlated with the total dry matter at the heading stage and mature stage.Additionally,the yields obtained were positively correlated with the number of effective panicles,the number of grains per panicle and the seed setting rate but negatively correlated with the weight of the thousand-grain weight.3.Aso,there were higher significant differences in rice quality,appearance quality,milling quality,and protein content among different varieties.among which the milled rice rate is 64.05%～69.61%,the whole milled rice rate is 27.07%-50.83%,the chalky rice rate is 16.67%～41.00%,the chalkiness degree is 4.20%～18.25%,and the protein content is 54.94-85.46mg/g their comprehensive score of cooking taste evaluation was more than 60.C liangyouhuazhan,Fengyouxiangzhan,y liangyou1,chuanyou6203,jingliangyouhuazhan,yixiangyou37 had relatively higher rice milling quality and appearance quality with a relatively higher cooking taste compared to the other varieties.As observed in this study,in the machine planting of Lezhi county,the varieties with high yield and good quality are C liangyouhuazhan,Yixiang 37,Y Liangyou 1,etc.,the varieties with high yield and general quality are Rong 18 you 1105,Yixiang you 800.,and the varieties with good quality and general yield are Fengyouxiangzhan,Chuanyou 6203...