吉林农业大学学报2024，Vol.46Issue(6)：945-955,11.DOI:10.13327/j.jjlau.2024.0690
不同灌溉方式和施氮量对水稻光合特性、农艺性状及氮素利用的影响
Effects of Different Irrigation and Nitrogen Application Methods on Photosynthetic Characteristics,Agronomic Traits and Nitrogen Use of Rice
摘要
Abstract
"Longqing No.3"rice was used as material,two irrigation methods were set up:controlled irrigation and flood irrigation.Nitrogen application levels were 0,60,85,110,135 and 160 kg/hm2,respectively.The effects of different irrigation methods and nitrogen application levels on photosyn-thesis,fluorescence and agronomic traits of rice were studied.The results showed that nitrogen fertil-izer was the main factor affecting photosynthetic characteristics compared with irrigation.Under con-trolled irrigation,net photosynthetic rate(Pn),stomatal conductivity(Gs)and transpiration rate(Tr)were increased by 6.70%-31.74%,18.39%-49.04%and 16.91%-38.48%,respectively(P＜0.05).Under flood irrigation,net photosynthetic rate(Pn),stomatal conductance(Gs)and transpiration rate(Tr)were increased by 12.13%-28.20%,14.40%-18.35%and 0.40%-8.18%,respectively(P＜0.05).The intercellular carbon dioxide concentration(Ci)between the two irrigation methods was 150-350 µmol/mol,and no significant difference was found between the two irrigation methods(P＞0.05).Fo,Fm and Fs of 110 kg/hm2 and 135 kg/hm2 nitrogen fertilization treatments were better than other treatments,and radiation utilization efficiency(RUE)was also better than other treatments.Compared to flood irrigation,RUE value of the control irrigation was higher(1.60a＞1.52c).In agronomic traits,stem diameter and leaf area had a reasonable critical value(135 kg/hm2)for nitrogen uptake and uti-lization,and exceeding the optimal nitrogen application rate was not conducive to growth.Plant height increased with the increase of N application,with the maximum of 160 kg/hm2.Further analy-sis by the semi-variance function model showed that stem diameter and leaf area had moderate spa-tial autocorrelation,with a high degree of spatial heterogeneity caused by spatial autocorrelation,indi-cating that spatial heterogeneity caused by random components was relatively large,while spatial cor-relation of plant height was weak.Therefore,controlled irrigation had better nitrogen utilization than flood irrigation,with the optimal nitrogen application of 110 kg/hm2.关键词
水稻/灌溉方式/施氮量/光合作用/农艺性状/氮素Key words
rice/irrigation method/nitrogen application account/photosynthesis/agronomic trait/nitrogen分类
农业科技引用本文复制引用
张超,郑恩楠,顾鹤南,赵小勇..不同灌溉方式和施氮量对水稻光合特性、农艺性状及氮素利用的影响[J].吉林农业大学学报,2024,46(6):945-955,11.基金项目
水灾害防御全国重点实验室"一带一路"水与可持续发展科技基金资助项目(2022490911),浙江省自然科学基金项目(LZJWY22D010002) （2022490911）
