| 【Object】: Wheat is the most important grain crops in Xinjiang,Wheat production is extremely important for food security and social stability in Xinjiang Autonomous Region.In recent years,the development of drip irrigation wheat in Xinjiang has been rapid,but its related theories and techniques are not sound enough.At present,the main cultivation method of drip irrigation wheat in Xinjiang is "1 tube serves 4 rows" drip irrigation mode.This model still has the problems of high water consumption and a large amount of drip irrigation belt.Therefore,expanding the pipeline is a fundamental way to reduce production costs and ensure the sustainable development of drip irrigation wheat.However,in the drip irrigation mode,expanding the pipeline will lead to different lines.Plant yields show significant differences,Therefore,expanding the pipeline is the fundamental way to reduce production costs and ensure the sustainable development of wheat under drip irrigation.However,under drip irrigation mode,expanding the pipeline will cause significant differences in the grain yield of plants in different rows,Therefore,in this study,the effects of different tuberow ratio drip irrigation belt configurations on the dynamics of dry matter accumulation,distribution,and transport characteristics and yield of spring wheat plants were studied,and the accumulation of main storage photosynthetic products(fructans)was measured to further reveal The effect of the difference in water distribution between soil rows on the accumulation and translocation of fructan under the drip irrigation planting method of expanded pipe-row ratio,clarifying the reasons for the formation of the yield difference between wheat rows,and providing a theory for drought-resistant wheat breeding,high-yield cultivation and stable and high-yield drip irrigation in Xinjiang following.Wheat is the most important grain crops in Xinjiang,Wheat production is extremely important for food security and social stability in Xinjiang Autonomous Region.In recent years,the development of drip irrigation wheat in Xinjiang has been rapid,but its related theories and techniques are not sound enough.At present,the main cultivation method of drip irrigation wheat in Xinjiang is "1 tube serves 4 rows" drip irrigation mode.This model still has the problems of high water consumption and a large amount of drip irrigation belt.Therefore,expanding the pipeline is a fundamental way to reduce production costs and ensure the sustainable development of drip irrigation wheat.However,in the drip irrigation mode,expanding the pipeline will lead to different lines.Plant yields show significant differences,Therefore,expanding the pipeline is the fundamental way to reduce production costs and ensure the sustainable development of wheat under drip irrigation.However,under drip irrigation mode,expanding the pipeline will cause significant differences in the grain yield of plants in different rows,Therefore,in this study,the effects of different tube-row ratio drip irrigation belt configurations on the dynamics of dry matter accumulation,distribution,and transport characteristics and yield of spring wheat plants were studied,and the accumulation of main storage photosynthetic products(fructans)was measured to further reveal The effect of the difference in water distribution between soil rows on the accumulation and translocation of fructan under the drip irrigation planting method of expanded pipe-row ratio,clarifying the reasons for the formation of the yield difference between wheat rows,and providing a theory for drought-resistant wheat breeding,high-yield cultivation and stable and high-yield drip irrigation in Xinjiang【Methods】: The field experiment has consisted of 3 treatments:TR4(one pipe fore 4 rows,bandwidth is 60 cm),TR6(one pipe fore 6 rows,bandwidth is 90 cm),and TR8(one pipe for 8 rows,bandwidth is 120 cm)for investigations of plant and its vegetative organs dry matter accumulation dynamics,dry matter distribution and transport characteristics,yield and its constituent factors with two wheat varieties(Xinchun22 and Xinchun44).HPLC method was used to determine the content of fructan in inverted two stems and inverted two sheaths under different treatments,and to explore the effect of drip irrigation mode on the accumulation and transport of fructan.【Results】: The result showed that the dry weight of the plant and each organ showed a downward trend,and showin TR4>TR6>TR8,under the three drip irrigation belt configuration modes of TR4,TR6,and TR8,;as the growth process progressed,the plant and ear dry matter The accumulative change showed an "S" curve;the stem and dry weight showed a trend of increasing first and then decreasing.The accumulation of dry matter per plant was the highest,and the rapid accumulation of dry matter lasted the longest under TR4 treatment,.Grain yield is mainly derived from the transport of assimilation after anthesis,and the contribution of anthesis after anthesis to the grain yield is 79.49%~83.97%.TR4 treatment was the highest contribution rate of dry matter transport amount,transport efficiency,and dry matter transport amount before flowering between different treatments;TR8 treatment was the highest contribution rate of post-flower assimilation to grain yield,with the increase of bandwidth The grain yield,spike number,spike grain number and 1000-grain weight of the two varieties of wheat showed a downward trend;the grain yield of the two varieties was the highest under TR4 treatment,and the grain yield of Xinchun 22 and Xinchun 44 was 2.22g/plant and 2.55g/plant,respectively.Correlation analysis showed that the grain yield of Xinchun 22 was mainly affected by the number of ears,while the grain yield of Xinchun 44 was mainly affected by the weight of thousand kernels.The main reason for the decrease in grain yield after expanding the tube-row ratio is that long-distance wheat is often affected by drought stress,and the grain yield is significantly reduced.As the growth process progressed,the content of fructan in different vegetative organs showed a single-peak curve,and the content of fructan in the stalks of the two wheat varieties showed a single-peak curve,both of which reached the maximum 14 days after anthesis.Appropriate water deficit increases the content of fructan in the stem and leaf sheath,but as the degree of water deficit increases,the content of fructan decreases significantly.【Conclusions】:In this experiment,drip dry matter accumulation between rows and each wheat plant vegetative organs of the cell level and yield per plant are different degrees of decline occurs under the expansion ratio of the pipeline.The theoretical dry matter accumulation amount,dry matter accumulation rate,and the duration of rapid dry matter accumulation of the two varieties of nearline plants are higher than those of other lines,while the rapid accumulation duration of distant plants is shortened,which is not conducive to their dry matter accumulation.Increasing the tube ratio reduced the wheat yield,but the grain yield of Xinchun 44 was lower than that of Xinchun 22,and the grain yield of Xinchun 44 was higher than that of Xinchun 22.Enlarging the tube-row ratio affected the yields of Xinchun 22 and Xinchun 44 by reducing the number of grains per spike and 1000-grain weight,respectively.After expanding the ratio of the tube to row,the dry weight of distant plants was significantly reduced,the proportion of dry matter allocated to the stalk and glume(including cobs)increased,the dry weight of ears was relatively reduced,and the decrease in dry matter transport efficiency before anthesis may be a reason of decrease in grain yield. |
