氮、磷、硅营养及交互作用对青稞“13-5171-7”生长及产量的影响

Effects of N,P and Si Nutrition and Their Interaction on Growth and Yield of Highland Spring Barley New Strain ’13-5171-7’

为了解氮(N)、磷(P)、硅(Si)营养对春青稞新品系“13-5171-7”生长及产量的影响,设计了3因素2水平完全随机区组试验,分析了青稞灌浆期基部第二叶片丙二醛、株高、产量及产量因子指标,结果表明:(1)N,P,Si及N×Si交互作用对“13-5171-7”株高的影响极有统计学意义(p<0.01),Si对基部第2叶片丙二醛含量的影响极有统计学意义(p<0.01);(2)增施N,P,Si营养,青稞“13-5171-7”的产量均不同程度地提高,其中单施Si肥和P肥(T2,T3)“13-5171-7”产量较CK的差异无统计学意义(p>0.05),增施N肥以及N肥与P肥、Si肥配合施用、Si肥与P肥配合施用处理,“13-5171-7”的产量较CK处理青稞产量都显著提高(p<0.05);(3)增施N,P,Si营养对“13-5171-7”的穗长、穗粒数、成穗数和千粒质量有不同程度的提高,N,P,Si对穗粒数的影响差异有统计学意义(p<0.05),从而极显著影响产量(p<0.01)。该研究中T5(N:8 kg/667 m^(2))、T6(N:8 kg/667 m^(2),途保佳120 mL/667 m^(2))处理“13-5171-7”平均产量较高。

To understand the effects of N,P and Si nutrition on the growth and yield of spring highland barley new strain 13-5171-7,a complete randomized experiment with three factors and two levels was designed.The indexes of malondialdehyde(MDA)of the basal second leaf at the grain filling stage,plant height,yield and yield factor were analyzed.The results showed that:(1)N,P,Si and the interaction of N*Si had a significant effect on the plant height of‘13-5171-7’(p<0.01).Si had a significant effect on the MDA content of basal second leaf(p<0.01);(2)with the nutrition of N,P and Si supplying,the yield of highland barley‘13-5171-7’increased significantly at different degree.However,the yield of‘13-5171-7’was no significant difference with that of CK(p>0.05)by applying silicon fertilizer and phosphorus fertilizer(T2 and T3)alone,and the yield of‘13-5171-7’was significantly higher than that of CK treatment by increasing n fertilizer,combination of N,P and Si fertilizer,or combination of silicon fertilizer and P fertilizer;(3)the panicle length,the grain number per panicle,panicle number and 1000 grain weight of‘13-5171-7’increased by increasing appolication N,P and Si fertilizer.Especially the effect on the grain number per panicle was significantly(p<0.01).The conclusion was the treatments of T5(n:8 kg/667 m^(2))and T6(n:8 kg/667 m^(2),Si fertilizer 120 mL/667 m^(2))were better than others with higher average yield.