叶用型沙棘鲜叶量估算及表型选择初步研究

叶用型沙棘生长适应性和抗逆性相对较强,选育出的优良品种具有枝叶繁茂、生物产量高、棘刺少等特点。本研究对沙棘杂交子代的一系列形态指标进行了调查、统计、分析,并对当年生枝条数、单株鲜叶量进行了估算,然后以当年生枝棘刺密度、鲜叶量作为叶用型沙棘表型选择的指标评选优株。结果表明:杂交子代的表现明显优于其亲本,其中,当年生枝平均棘刺密度比父本低80.75%;鲜叶重均值比母本高193.84%、比父本高8.33%;通过选优排序,选出150、33、188、76、109、171为优良单株,可作为下一步研究的育种材料。

几种因素对烤烟不同部位抗拉力的影响

在四川省泸州市古蔺县烟草科技示范园开展田间试验,研究几种因素对烤烟不同部位抗拉力值的影响。结果表明,鲜叶重、茎叶夹角、叶长、含水率等与抗拉力值存在二次多项式关系。在一定范围内,烤烟不同部位抗拉力值随鲜叶重增加、叶片长度增加、茎叶夹角增大而增大;超过一定范围后,烤烟不同部位抗拉力值随鲜叶重增加、叶片长度增加、茎叶夹角增大而减小。

草珊瑚林间栽培习性及收获模型

简介草珊瑚林间栽培适宜环境及鲜叶、地上鲜重、叶面积

Impacts of Primo MAXX Growth Regulator on the Growth of Bermuda Grass

[Objective] The aim was to investigate the effects of Primo MAXX growth regulator on growth of Bermuda grass,explore appropriate application concentration of Primo MAXX on Bermuda grass,and provide basis for the application of Primo MAXX in Bermuda meadow.[Method]The height,leaf colour and the aerial part＇s fresh weight of Bermuda grass treated with different concentrations were researched using single factor random block test.[Result]Primo MAXX application effectively reduced the height in all treatment without significant difference;appropriate application of Primo MAXX can enrich the color;and 35 days after application,Bermuda grass roots were become thicker.[Conclusion]The application of Primo MAXX with effective dose of 150-300 g/hm2 on Bermuda grass in southern China is more appropriate.