小麦品种百农矮抗58茎秆特性分析

Analysis on culm characteristics of BN AK58

通过不同播期小麦基部茎秆形态特征的观察与测量,研究百农矮抗58茎秆特性及茎杆倒伏指数.结果表明:播期也是影响百农矮抗58抗倒性的一个因素,早播有利于提高其抗到性能;播期对百农矮抗58的各节间长度、粗度以及第二节间壁厚均有影响;第二节间较短、较粗、茎秆壁较厚,则茎秆抗倒能力较强;灌浆后期茎秆弹性较强,承压能力增大,倒伏系数降低.总之,影响茎秆特性的关键因素是基因型.

The culm characteristics and culm lodging indexes of BN AK58 were studed through observing and measuring root culm conformation of wheat of different varieties and different sowing time. The results indicated that lodging resistance was different because of different varieties, the sowing time was a factor affecting lodging resistance of BN AK58, early sowing was propitious to enhance lodging resistance; the sowing time affected burl length, width, and wall thick of the second burl; shorter, wider, and thicker of the second burl resulted in stronger lodging resistance. Culm flexibility was stronger in filling anaphase, undertaking ability was larger, lodging index was reduced. In conclusion, the key factor was genotype affecting lodging resistance.