轻简氮肥管理对华南双季稻产量和氮肥利用率的影响

彭碧琳,李妹娟,胡香玉,钟旭华,唐湘如,刘彦卓,梁开明,潘俊峰,黄农荣,傅友强,胡锐

Effects of Simplified Nitrogen Managements on Grain Yield and Nitrogen Use Efficiency of Double-Cropping Rice in South China

PENG BiLin,LI MeiJuan,HU XiangYu,ZHONG XuHua,TANG XiangRu,LIU YanZhuo,LIANG KaiMing,PAN JunFeng,HUANG NongRong,FU YouQiang,HU Rui

表4 不同氮肥管理下水稻叶片SPAD值和群体透光率

Table 4 Leaf SPAD value and canopy light transmittance under different nitrogen managements

年份/季节 Year/Season 处理 Treatment SPAD值SPAD value 透光率Canopy light transmittance (%) 分蘖中期MT 穗分化始期PI 抽穗期HD 穗分化始期PI 抽穗期HD 成熟期MA 2018晚季 Late season of 2018 N0 36.88±0.23b 35.58±0.63c 35.93±0.4c 56.93±4.17a 34.08±1.29a — TC 41.03±0.27a 38.43±0.92b 39.98±0.21b 30.18±2.13bc 12.18±0.70c — RTC 41.13±0.55a 38.40±0.44b 38.70±0.91b 32.53±2.19bc 12.98±0.51bc — SNM1 41.10±0.37a 41.11±0.48a 38.28±0.89b 26.53±1.59c 10.65±1.10c — SNM2 40.73±0.27a 36.58±0.46c 42.38±0.32a 35.85±1.68b 12.00±0.65c — SNM3 40.98±0.23a 37.23±0.5bc 39.98±0.31b 34.83±2.65b 15.68±0.98b — F值（F value） 26.27** 9.98** 15.27** 23.99** 123.74** — 2019早季 Early season of 2019 N0 39.80±0.39c 34.91±0.51c 37.88±0.36b 55.05±1.35a 30.68±3.29a 17.92±0.79a FP 41.49±0.41a 40.85±0.89a 38.66±1.04b 25.06±1.33c 10.88±2.14b 7.54±0.77b TC 41.32±0.13ab 38.97±1.19ab 41.84±0.43a 34.66±2.17b 9.99±1.06b 7.63±0.59b SNM2 40.76±0.38abc 37.92±0.43b 42.60±0.65a 38.82±2.44b 6.99±0.59b 7.46±0.49b SNM4 40.23±0.62bc 38.97±0.39ab 42.51±0.66a 41.53±3.54b 6.33±0.69b 6.55±0.54b SNM5 40.67±0.36abc 37.08±1.25bc 42.00±0.19a 37.48±1.86b 10.56±1.67b 7.94±0.76b F值（F value） 2.76ns 4.89** 13.63** 17.46** 25.33** 50.65**