Study On The Relationship Between Water Consumption And Grain Yield And Quality Of Wheat At Different Seeding Rate

This test in 2017-2018 in jinzhong city in shanxi Taigu County ShenFeng village,cropping system for soybean,wheat,using randomized block design,set up 150 kg·hm2,225 kg·hm-2,300 kg·hm-2,375 kg·hm-2 and 450 kg·hm-2 five sowing quantity gradient,test of wheat and 175 varieties of wheat varieties,late time under the conditions of different sowing quantity processing was studied on wheat growth period stage of water consumption and water consumption,group dynamics,yield,yield components,water use efficiency and the influence of grain protein and so on,In order to provide a theoretical basis for the cultivation of late sowing in jinzhong area,the optimal sowing quantity range was explored.The main results are as follows:(1)the results of this study showed that the growth and development of plants were affected by the amount of sowing,and the plant height showed a decreasing trend with the increase of the amount of sowing.In spring,tiller number per plant decreased,and the main stem was used as the main stem when the sowing amount reached 300 kg·hm-2 in the booting stage,and there were 1.56 more tiller per plant in the treatment of 150 kg·hm-2 sowing amount than in the treatment of 450 kg·hm-2 sowing amount.In the booting stage,the number of main stem leaves decreased,and the number of sowing lots of 225 kg·hm-2,300 kg·hm-2,375 kg·hm-2 and 450 kg·hm-2 treated main stem leaves decreased by 4.92 pieces,7.00 pieces,6.19 pieces and 8.03 pieces,respectively,compared with that of 150 kg·hm-2 treated.In the booting stage,the number of rooting strips decreased by 3.50,7.44,6.33 and 8.19 respectively compared with the treatment with 150 kg·hm-2.(2)with the increase of sowing amount,the yield first increased and then decreased.The highest sowing amount was treated with 300 kg·hm-2 sowing amount,followed by 225 kg·hm-2 sowing amount,and the lowest was treated with 450 kg·hm-2 sowing amount.The yield difference between 225 kg·hm-2 sowing amount and 300 kg·hm-2 sowing amount was not significant.From the yield components,with the increase of information quantity,groups of spikelets increased,but the fertile spikelet number decreases,the infertility spikelet number increased,eventually spike grain number and grain weight decreased,225 kg·hm-2,300 kg·hm-2,375 kg·hm-2 and 450 kg·hm a 150 kg·hm-2-2 processing on minimum processing spike grain number reducing respectively 2.73,6.23,13.73 and 14.73,grains were lower 2.80 g,3.17 g and 6.15 g and 6.80 g.(3)with the increase of seeding amount,protein components,protein content and final protein yield all showed a trend of increasing at first and then decreasing,with 225 kg·hm-2 seeding amount and 450 kg·hm-2 treatment having the highest indexes and the lowest indexes.There was no significant difference in protein yield between 225 kg·hm-2 and 300 kg·hm-2 treatments,but the variance analysis difference was significant compared with other treatments.The trend of albumin and globulin sowing amount treatment was consistent,the difference between treatments of 150 kg·hm-2,300 kg·hm-2 and 375 kg·hm-2 sowing amount was not significant,and the difference between treatments of 450 kg·hm-2 sowing amount and other sowing amount treatments was significant.The content of alcohol soluble protein and gluten was the lowest in the treatment with 450 kg·hm-2 sowing amount,and the difference was significant compared with other sowing amount treatments.The grain/alcohol ratio of 150 kg·hm-2 and 450 kg·hm-2 were the lowest,and the grain/alcohol ratio of 225 kg·hm-2,300 kg·hm-2 and 375 kg·hm-2 were the same.The difference was significant compared with that of 150 kg·hm-2 and 450 kg.hm 2.(4)the total water consumption,stage consumption and water consumption composition of 0-200 cm soil water were different at different sowing amounts of wheat,and the total water consumption was the highest under the treatment of 300 kg·hm-2.Different stages also have different water consumption.From sowing to jointing stage,the minimum seeding amount of 150kg·hm-2 and the maximum seeding amount of 450kg·hm-2 have the lowest total water consumption,and the maximum seeding amount of 300kg·hm-2 has the highest water consumption.From jointing to flowering,the water consumption in the 300kg·hm-2 treatment stage is the least,and the water consumption in the 450kg·hm-2 treatment stage is the highest.From flowering to maturity,300 kg·hm-2 treatment stage consumed the most water,while 450 kg·hm-2 treatment stage consumed the least water,mainly rainfall and soil water.The wue first increased and then decreased with the increase of seeding amount,and the treatment with 225 kg·hm-2 seeding amount was the highest.Based on comprehensive indexes such as yield,wue and protein,225 kg·hm-2 and 300 kg·hm-2 sowing amount were used to obtain higher grain yield,higher wue and better protein quality index.