株行距对纳罗克非洲狗尾草种子产量的影响  

Effect of Planting Spacing on Seed Yield of Setaria sphacelata cv. “Narok”

作　　者：王琰 张红映 罗富成[1] 罗班乾 郭德文 李莉 李海荣 陈梅 秦源源 WANG Yan;ZHANG Hong ying;LUO Fu - cheng;LUO Ban-qian;GUODe-wen;LI Li;LI Hai - rong;CHEN Mei;QIN Yuan - yuan(Department of Grassland Science, Animal Science and Technology College, Yunnan Agricultural University, Kunming 650201, China;Yongde Animal husbandry station, Yunnan Yongde 677600, China;Yongde Animal Disease Prevention and Control Center, Yunnan Yongd~ 677600, China)

机构地区：[1]云南农业大学动物科学技术学院草业科学系,云南昆明650201 [2]云南省永德县畜牧站,云南永德677600 [3]云南省永德县动物疾病预防控制中心,云南永德677600

出　　处：《草学》2018年第2期18-23,共6页Journal of Grassland and Forage Science

基　　金：云南省现代农业草产业技术体系建设(2017KJTX0018);国家自然科学基金"纳罗克非洲狗尾草种子休眠机理及解除方法研究"(31260582);云南农业大学硕士专业学位研究生校外实践基地--草业专业学位研究生实践基地建设(2014YS0010)共同资助

摘　　要：纳罗克非洲狗尾草(Setaria sphacelata cv."Narok")为热带亚热带优良禾本科牧草,但其种子产量很低,生产数量有限,不利于南方草牧业的发展。为提高纳罗克非洲狗尾草的种子产量,在云南热区以其成年植株为试验材料,设计30cm×30cm^70cm×70cm 9个株行距,分株繁殖,观测相关指标。结果表明:株行距对株高、分蘖数、穗长以及种子产量有显著影响。其最佳株行距为60cm×70cm或70cm×70cm,株高、分蘖数、穗长、种子产量可分别达到214.0cm、108.7个/株、36.1cm、286.4kg/hm^2·年.;种子产量是对照(50cm×50cm)的1.25倍、最窄株行距的1.69倍、各株行距平均产量的1.30倍。全年可收种3批,各季产量分别占50.2%、25.8%、24.0%。第一季的种子产量显著高于第二季和第三季(P<0.05)。Setaria sphacelata cv. ＂Narok＂is one of the most excellent grasses in the tropics and subtropics,the yield from its seed plant is low,leading to limited productions,which is detrimental to the development of grassland farming in the south of China. In order to improve the seed production of S. sphacelata cv. ＂Narok＂,the grown plants in Yunnan hot area were used as experimental materials,A total of 9 kinds of row spacing and plant spacing were designed which were from 30 cm × 30 cm to 70 cm × 70 cm,and relevant indexes were observed. The results showed that the row spacing and plant spacing had significant effects on plant height,tiller number,spike length and seed yield. The suitable row and plant spacing was 60 cm × 70 cm or 70 cm × 70 cm. The plant height,tiller number,spike length and seed yield could reach 214. 0 cm,108. 7 branches/plant,36. 1 cm and 286. 4 kg/hm^2· yr. Seed yield was 1. 25 times of that of the control（ 50 cm× 50 cm） and 1. 69 times of that of the narrowest plant spacing,with 1. 30 times of that of the average yield of all plant spacing. Seeds can be harvested for 3 times throughout the year. The seed yield at the first time,second time and third time accounted for 50. 2%,25. 8% and24. 0% of total annual production,and the yield in the first season was significantly higher than the others（ P〈0. 05）.

关 键 词：云南热区 纳罗克非洲狗尾草 株行距 株高 分蘖数 穗长 种子产量 

分 类 号：S543.038[农业科学—作物学]