土层厚度与灌溉方式对寒地水稻节水生长及产量的影响OA北大核心CSTPCD

[Objective]This paper is to explore the effect of different soil thickness and irrigation methods on rice growth in cold region.[Method]In 2020,a rice water-saving experiment was carried out in Yuan Longping Rice test Base,Keyou Front Banner,Ulanhot City,Xingan League.The experiment consisted of three soil thickness treatments:15-20 cm(H1),20-25 cm(H2)and 25-30 cm(H3),and two irrigation treatments:controlled irrigation(K)and conventional irrigation(CK).In each treatment,we measured the growth and yield of the rice.[Result]The plant height in the K treatment was lower than that in the CK.Compared to CK,the K treatment increased root length,stem diameter,effective panicle number per hole,thousand grain weight and the rice yield.Compared to H1,H2 and H3 increased rice yield by 30.49%-32.91%and 63.74%-76.33%,respectively.Compared to CK,the K treatment reduced total irrigation amount by 55.04%-56.84%,and increased irrigation water productivity by 1.55 to 1.86 times.Compared to H1,H2 and H3 increased the irrigation water productivity by 35.61%to 38.62%and 73.07%to 94.14%,respectively.[Conclusion]Irrespective of the irrigation methods,varying soil thicknesses exerted distinct effects on plant height,root length,stem thickness,effective panicle count per hole,and rice yield.Implementing controlled irrigation alongside a soil thickness of 25-30 cm significantly enhanced rice growth,improved water use efficiency,and boosted rice yield.These findings offer valuable guidelines for rice cultivation in cold regions.