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Lodging resistance increased by varying the distance between adjacent maize rows
Agronomy Journal ( IF 2.1 ) Pub Date : 2021-05-10 , DOI: 10.1002/agj2.20716 Bingqin Qi 1 , Buyi Ma 1 , Jun Xue 1, 2 , Bixia Li 1 , Jing Hu 1 , Wangfeng Zhang 1 , Ling Gou 1
Agronomy Journal ( IF 2.1 ) Pub Date : 2021-05-10 , DOI: 10.1002/agj2.20716 Bingqin Qi 1 , Buyi Ma 1 , Jun Xue 1, 2 , Bixia Li 1 , Jing Hu 1 , Wangfeng Zhang 1 , Ling Gou 1
Affiliation
High planting density of maize (Zea mays L.) changes the distribution of photosynthetically active radiation (PAR) in the canopy and reduces the stalk quality, thus increasing the risk of lodging. The light distribution in the canopy can be changed by changing the row spacing between adjacent row, which in turn may affect lodging resistance. Two maize cultivars, Zhongdan 909 and Xinyu 41 were planted in 60 cm (CK) and three configurations that had different distances between the rows. These treatment were 70 + 50 cm where rows 1 and 2 were separated by 50 cm and rows 2 and 3 were separated by 70 cm. The other treatments were 80 + 40 and 90 + 30 cm. All rows had an equal number of plants. In these plots, canopy light distribution and stalk lodging resistance was measured. The results showed that the intercepted photosynthetically active radiation (IPAR) of the whole canopy in the 70 + 50 and 80 + 40 cm did not differ from the CK, but the IPAR from ear level to halfway below the ear level and the soil (H3–H2) increased by 12.5 and 20.1%, compared with the CK. Basal internode cellulose and lignin contents, rind puncture strength (RPS) increased, and lodging rate decreased by 2.8 and 4.5% in the 70 + 50- and 80 + 40-cm treatments compared to the CK. Intercepted PAR in the 90 + 30-cm treatment decreased, as did its cellulose contents, and RPS, while lodging increased. Therefore, the 70 + 50- and 80 + 40-cm treatments could increased IPAR in the H3–H2 layer, then cause the increase of the cellulose content in the basal internode and lodging resistance.
中文翻译:
通过改变相邻玉米行之间的距离来增加抗倒伏性
玉米种植密度高(Zea maysL.) 改变了树冠中光合有效辐射 (PAR) 的分布,降低了茎秆质量,从而增加了倒伏的风险。可以通过改变相邻行之间的行距来改变树冠内的光分布,这反过来又会影响抗倒伏性。两个玉米品种,中单 909 和新玉 41 种植在 60 cm (CK) 和具有不同行距的三种配置。这些处理为 70 + 50 cm,其中第 1 行和第 2 行相隔 50 厘米,第 2 行和第 3 行相隔 70 厘米。其他处理为 80 + 40 和 90 + 30 厘米。所有行都有相同数量的植物。在这些地块中,测量了冠层光分布和茎秆抗倒伏性。3 –H 2 ) 与 CK 相比分别增加了 12.5% 和 20.1%。与 CK 相比,70 + 50- 和 80 + 40-cm 处理的基础节间纤维素和木质素含量、外皮穿刺强度 (RPS) 增加,倒伏率降低 2.8% 和 4.5%。在 90 + 30 厘米处理中截获的 PAR 降低,其纤维素含量和 RPS 也降低,而倒伏增加。因此,70 + 50- 和80 + 40-cm 处理可以增加H 3 -H 2层的IPAR ,进而引起基部节间纤维素含量和抗倒伏性的增加。
更新日期:2021-05-10
中文翻译:
通过改变相邻玉米行之间的距离来增加抗倒伏性
玉米种植密度高(Zea maysL.) 改变了树冠中光合有效辐射 (PAR) 的分布,降低了茎秆质量,从而增加了倒伏的风险。可以通过改变相邻行之间的行距来改变树冠内的光分布,这反过来又会影响抗倒伏性。两个玉米品种,中单 909 和新玉 41 种植在 60 cm (CK) 和具有不同行距的三种配置。这些处理为 70 + 50 cm,其中第 1 行和第 2 行相隔 50 厘米,第 2 行和第 3 行相隔 70 厘米。其他处理为 80 + 40 和 90 + 30 厘米。所有行都有相同数量的植物。在这些地块中,测量了冠层光分布和茎秆抗倒伏性。3 –H 2 ) 与 CK 相比分别增加了 12.5% 和 20.1%。与 CK 相比,70 + 50- 和 80 + 40-cm 处理的基础节间纤维素和木质素含量、外皮穿刺强度 (RPS) 增加,倒伏率降低 2.8% 和 4.5%。在 90 + 30 厘米处理中截获的 PAR 降低,其纤维素含量和 RPS 也降低,而倒伏增加。因此,70 + 50- 和80 + 40-cm 处理可以增加H 3 -H 2层的IPAR ,进而引起基部节间纤维素含量和抗倒伏性的增加。