盐土条件下不同栽培措施对4种禾本科饲草阳离子分布的影响  

Effects of Cultivation Measures on the Cationic Content and Distribution of Forage in Saline Soil

作　　者：张文洁[1] 丁成龙[1] 程云辉[1] 许能祥[1] 

机构地区：[1]江苏省农业科学院畜牧研究所,江苏南京210014

出　　处：《草地学报》2015年第1期107-113,共7页Acta Agrestia Sinica

基　　金："十二五"国家科技支撑计划课题(2011BAD17B02)资助

摘　　要：为探讨盐土条件下牧草栽培技术,以4种禾本科牧草为材料,研究了3种不同栽培措施对饲草体内Na^+,K^+,Ca^(2+),Mg^(2+)含量和分布的影响。结果表明:同一品种不同栽培措施处理下植株体内各离子含量差异显著(P<0.05),覆秸秆与添加保水剂处理饲草各部分Na^+含量及Na^+/Ca^(2+)显著低于对照;K^+,Ca^(2+),Mg^(2+)含量和K^+/Na^+显著高于对照。离子运输选择性系数S_(K^+·Na^+)均以覆秸秆处理与添加保水剂处理显著高于对照(P<0.05)。相同栽培措施下甜高粱(Sorghum saccharatum)与高丹草(Sorghum bicolor×sorghum Sudanese)体内的K^+/Na^+在茎、叶中的分布显著高于青贮玉米(Zea mays)和墨西哥玉米(Euchlaena mexicana)。在盐土条件下,覆秸秆和添加保水剂处理可使饲草地上部分的Na^+含量降低,K^+含量升高,维持饲草体内较高的K^+/Na^+和S_(K+·Na^+)值,提高饲草的耐盐性;不同饲草品种之间耐盐性差异较大。The contents of Na＋, K＋, Ca2＋, Mg2＋ and the four cationic accumulations in different parts of plant were measured in order to explore a suitable culture technique for forages in saline soil. The results showed that the contents of Na＋, K＋, Ca2＋ and Mg2＋ of different parts of grasses in the same variety were significant difference from different cultivation measures （P〈0.05）. The contents of Na＋ and Na＋/Ca2＋ in tested materials under covering straw and the addition of water retaining agent treatments were significantly lower than control, but the contents of K＋, Ca2＋, Mg2＋, K＋/Na＋ and SK＋/Na＋ （stem/root） were higher than that of control. Among different varieties, the K＋/Na＋ ratios in the leaves and stems of Sorghum saccharatum and sudangrass were higher than that of silage maize and Zea Mexicana. In a word, the above-ground part of forage contained less Na＋, higher K＋ contents and higher K＋/Na＋ under the cultivation measures of straw mulching and addition of water retaining agent, but the degrees of improvement differed from different varieties.

关 键 词：盐土 栽培措施 阳离子 

分 类 号：S318[农业科学—作物栽培与耕作技术]