Effects of Nitrogen Fertilizer Level on Chlorophyll Fluorescence Characteristics in Flag Leaf of Super Hybrid Rice at Late Growth Stage

To compare the effects of slow-release nitrogen fertilizer at six different levels on the flag leaf chlorophyll fluorescence characteristics of super hybrid rice, a field fertilization experiment was conducted with super hybrid rice Y Liangyou 1 as a test material. The photosynthetic electron transport rate （ETR）, effective quantum yield （EQY）, photochemical quenching coefficient （qp）, and non-photochemical quenching coefficient （NPQ） of flag leaves were measured at the initial heading, full heading, 10 d after full heading and 20 d after full heading stages. Results showed that the values of ETR, EQY and qp increased with rice development from initial heading to 20 d after full heading, whereas the NPQ decreased. During the measured stages, ETR, EQY and qp increased initially and then decreased as nitrogen application amount increased, but they peaked at different nitrogen fertilizer levels. The maximum ETR and EQY values appeared at the treatment of 135 kg/hm2 N. In conclusion, the optimum nitrogen amount for chlorophyll fluorescence characteristics of super hybrid rice was 135-180 kg/hm2.

益气补肾活血汤联合弱激光血管外照射治疗早期糖尿病肾病36例

目的:观察益气补肾活血汤联合弱激光血管外照射治疗早期糖尿病肾病(diabetic nephropathy,DN)的临床疗效。方法:将72例DN患者采用SAS软件生成的随机表分为治疗组与对照组,每组各36例。对照组给予厄贝沙坦片治疗,治疗组在对照组的基础上给予益气补肾活血汤联合弱激光血管外照射治疗。比较两组患者的临床疗效,检测两组患者治疗前后24 h尿蛋白定量、尿微量白蛋白(uric micro-albumin,UMA)、尿β_2-微球蛋白(β_2-microglobulin,β_2-MG)、尿白蛋白排泄率(urinary albumin excretion rates,UAER)、血尿素氮(blood urea nitrogen,BUN)、肌酐(serum creatinine,Scr)、空腹血糖(fasting blood glucose,FBG)、超敏C-反应蛋白(high-sensitivity c-reactive protein,hs-CRP)、转化生长因子-β(transforming growth factor-β,TGF-β)、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)及血液流变学指标变化情况。结果:治疗组有效率为88.89%,对照组有效率为69.44%,两组患者有效率比较,差异有统计学意义(P<0.05)。两组患者治疗后24 h尿蛋白定量、UMA、β_2-MG、UAER、BUN、SCr、TGF-β、hs-CRP、TNF-α、FBG及血液流变学指标低于治疗前,且治疗组低于对照组,差异有统计学意义(P<0.05)。结论:益气补肾活血汤联合弱激光血管外照射治疗早期DN,可降低患者血糖水平和血液黏稠度,改善肾功能,降低炎性反应,延缓疾病进展。