| In order to establish an efficient oat planting method under drip irrigation,a study was conducted during the growing season(2019-2020) to evaluate the effect of row spacing and super absorbent polymer on population structure,population quality and yield of oat. To conduct the field trials,a split plot design was established. Three row spacing was set up as the main plot,including 20 cm(A,conventional equal row spacing planting),15 cm(B,strip planting) and 10 cm(C,strip planting),and two super absorbent polymer levels were in the subplot,including 22.5 kg·hm-2(Y) and 0 kg·hm-2(N). The results showed that,moderate reduction of row spacing promoted the formation of oat population structure,improved population quality and increased yield,while excessive reduction of row spacing inhibited the growth of oats. When super absorbent polymers were not applied,there mainly showed no significant differences on the population structure,population quality and yield of oat between AN and BN. Under the conditions of no application of water retaining agent,there was no significant difference between AN and BN in oat population structure,population quality and yield. The difference was significant after the application of water retaining agent. Compared with AY,the total number of stems,the number of tillers,the panicle rate of tillers,the plant height,the population leaf area index,the lodging resistance index,and the grain yield of BY treatment were increased by 1.93%,4.48%, 4.40%,3.37%,9.43%,6.87%,and 16.65% on average in two years,respectively. Under the same row spacing,the application of water retaining agent promoted the formation of oat population structure,improved population quality and increased yield to varying degrees. Overall,it performed the best with the row spacing of 15 cm.Compared with BN,the basic seedling numbers,total number of stems at peak tillering stage,tiller numbers,panicle ratio of tillers,plant height,population leaf area index,lodging resistance index and grain yield of BY were significantly(P<0.05) increased by 1.88%,3.27%,5.10%,2.69%,6.67%,17.24%, 17.12%,and 22.99% on average in two years,respectively. To sum up,this study proposed that reducing the planting row spacing from 20 cm to 15 cm,adjusting the planting with equal row spacing to 8-row strip planting,and combining the drip irrigation oat planting method with 22.5 kg·hm-2 water retaining agent can improve the number and quality of oat population and promote the formation of grain yield. |
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