等氮条件下有机无机肥配施对小麦光合特性和群体结构的影响

为寻求最佳有机肥无机肥配施方式,以山西农业大学培育的山农9801为供试材料,在山西农业大学试验田进行了低氮(270 kg·hm^(-2))、高氮(360 kg·hm^(-2))2个施氮量下无机肥及有机肥各为37 500 kg·hm^(-2)、75 000kg·hm^(-2)4个有机肥无机肥配施共6个处理的田间试验,研究一定量氮肥下不同混施量的有机肥料与无机肥料对小麦群体叶面积指数、群体结构、叶绿素含量及光合特性的影响。结果表明:高氮情况下,有机肥为75 000 kg·hm^(-2)的处理组的叶面积指数值最高;低氮情况下,有机肥为75 000 kg·hm^(-2)的处理组的群体结构表现最为合理;高氮情况下,有机肥为75 000 kg·hm^(-2)的处理组的旗叶叶绿素含量和旗叶净光合速率最高,综上得出高氮情况下,有机肥75 000 kg·hm^(-2)、无机肥228.3 kg·hm^(-2)处理组(F组)为最佳试验组。

Effects of Partially Replacement of Inorganic N with Organic Materials on Photosynthetic Characteristic of Wheat and Population Structure Under the Same N Input

In order to find the best organic fertilizer and inorganic fertilizer,the material used in the experiment was winter wheat 9801,cultivated by Shanxi Agricultural University.The experiment was carried out in the experimental field of Shanxi Agriculture University with 2 low nitrogen (270 kg·hm-2) and high nitrogen (360 kg·hm-2) application rates of inorganic fertilizer and organic fertilizer for each of the 37 500 kg·hm-2、75 000 kg·hm-2 and the application of the 4 organic fertilizer inorganic fertilizer combined with a total of 6 treatments,the effects on group leaf area index、population structure、chlorophyll content and photosynthetic characteristic under a certain amount of nitrogen fertilizer mixed application of organic and inorganic fertilizer were studied.The result show that: the leaf area index was maximum when total nitrogen was high nitrogen condition,organic fertilizer was 75 000 kg·hm-2,inorganic fertilizer was 228.3 kg·hm-2;when total nitrogen was under low nitrogen condition,organic fertilizer was 75 000 kg·hm-2,inorganic fertilizer was 32.6 kg·hm-2,the group structure were most reasonable;the flag chlorophyll content and the flag net photosynthetic rate were maximum.On the whole,the optimum value of experimental groups total nitrogen was under high nitrogen condition,organic fertilizer was 75 000 kg·hm-2、inorganic fertilizer was 228.3 kg·hm-2 (F group).