Mahdavi B, Sanavy Seyed Ali Mohammad Modarres, Aghaalikhani Majid
Department of Agronomy, Faculty of Agriculture, Tarbiat Modarres University, P.O. Box 14115-336, Tehran, Iran.
Pak J Biol Sci. 2007 Apr 15;10(8):1243-9. doi: 10.3923/pjbs.2007.1243.1249.
In order to study the effect of four Root-Zone Temperatures (RZT) (5, 10, 15 and 25 degrees C) on nodulation and nitrogen percent of four grasspea ecotypes (ardabil, zanjan, mashhad and sharkord), an experiment was conducted in a controlled-environmental chamber in 2005. There were differences (p < 0.01) among ecotypes, RZT and ecotypes *RZT for root length, forage dry matter, root dry matter, nodule dry weight, nodule number, nodule cluster number, nodule cluster diameter, nodule diameter, nodule distribution (root length that has nodule) and plant nitrogen percent. Mashad and ardabil ecotypes produced the most and least nodule number at 25 and 5 degrees C, respectively. The maximum and minimum nodule cluster number were observed in ardabil ecotype under 25 and 5 degrees C RZT, respectively. Root distribution was the most and the least in mashhad and ardabil ecotypes under 25 and 5 degrees C RZT, respectively. Ardabil produced the highest dry nodule weight at 25 degrees C RZT. The least dry nodule weight was belonged to ardabil ecotype under 5 degrees C RZT. Plant nitrogen percent was the highest in ardabile ecotype at 15 degrees C RZT and the lowest in mashhad ecotype under 5 degrees C RZT. This experiment showed that at low RZT (i.e., 5 and 10 degrees C) none of ecotypes had preferred on other ecotypes in point of view measured traits except nodule diameter. Ardabile and mashhad ecotypes were better than other ecotypes at 15 and 25 degrees C RZT respectively for most traits.
为了研究4种根区温度（5、10、15和25℃）对4种草豌豆生态型（阿尔达比勒、赞詹、马什哈德和沙尔科德）结瘤和含氮量的影响，2005年在可控环境室内进行了一项试验。在根长、牧草干物质、根干物质、根瘤干重、根瘤数、根瘤簇数、根瘤簇直径、根瘤直径、根瘤分布（有根瘤的根长）和植株含氮量方面，生态型、根区温度以及生态型与根区温度的交互作用之间存在差异（p < 0.01）。马什哈德和阿尔达比勒生态型分别在25℃和5℃时产生的根瘤数最多和最少。根瘤簇数最多和最少分别出现在25℃和5℃根区温度下的阿尔达比勒生态型中。根分布最多和最少分别出现在25℃和5℃根区温度下的马什哈德和阿尔达比勒生态型中。在25℃根区温度下，阿尔达比勒产生的根瘤干重最高。在5℃根区温度下，根瘤干重最低的是阿尔达比勒生态型。植株含氮量在15℃根区温度下的阿尔达比勒生态型中最高，在5℃根区温度下的马什哈德生态型中最低。该试验表明，在低根区温度（即5℃和10℃）下，除根瘤直径外，在所测性状方面没有一种生态型比其他生态型更具优势。在15℃和25℃根区温度下，阿尔达比勒和马什哈德生态型在大多数性状上分别优于其他生态型。
