Elementary Morphology of Grass Growth and How it Affects Utilization.
Elementary Morphology of Grass Growth and How it Affects Utilization.
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DOI：
10.2307/3894384
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发表时间：
1956-07
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影响因子：
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通讯作者：
C. A. Rechenthin
中科院分区：
文献类型：
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作者：
C. A. Rechenthin
的论文提交的部分履行的要求，科学硕士学位的范围内管理，科罗拉多A。和M.大学，1954年。试图通过人工补播来恢复枯竭的大型冬季牧场的植被覆盖率的尝试一般都失败了。ga.me草食植物的成功补种一直受到缺乏有关处理草食种子的方法的信息的阻碍，这些方法将诱导令人满意的发芽。本文比较了层积、离子和酸蚀两种种子处理方法对三种灌木：羚羊角、山桃花心木和四翅滨藜种子萌发的诱导效果。为了比较的目的，还通过用氯化四氮唑通过地形图法对胚进行染色来确定这些种子的潜在发芽。层积是通过将种子置于潮湿的泥炭中来完成的。在310华氏度的温度下。到41？F.每隔一周取样一次，以确定分层的最佳时间。通过将晶种置于铜筛篮中并悬浮于浓硫酸中10分钟间隔至90分钟来完成酸沉淀。然后将种子洗涤并种植在蛭石平板中。在四个重复中，每个重复50粒种子用于发芽a，测试温度为620至770 ° F。灌木层积的最佳时期为49 ~ 70天。在层积49天后，一些种子开始发芽。层积70天的种子发芽率为82.5%，而未层积的种子发芽率仅为1%。酸处理50分钟，发芽率达83.5%。mounta.in的最佳分层时期ma.- Hogany是四个星期或更长。然而，在九个星期的栽培结束时，大部分种子开始发芽。层积70天的种子发芽率为71%，而未处理的种子发芽率为1%。山桃花心木种子在酸液中浸泡60分钟，发芽率最高，达51.5%。该数字显著高于对照，但也显著低于由层积产生的萌发。然而，A.cid筛选从种子中去除了毛状花柱，这将允许种子容易地通过播种机以更快速和有效地种植。四翅滨藜种子不需要分层，因此仅对这些种子使用a.cid处理。浸泡60分钟的种子发芽率为15.5%，对照为10.5%。通过使用2，3，5-三苯基-四唑氯化物染色的胚证明不确定性，表明桃花心木中的hitterbrush和mounta的发芽能力。然而，四翼滨藜对这种污渍的反应很好。四翅滨藜种子经染色后的平均发芽率为41%，而酸处理后的平均发芽率为14.75%。结果表明，酸腌和分层处理对苦瓜种子的萌发有同样的效果.酸蚀可以在比层积更短的时间内完成，并且在必须在最短时间内处理和种植种子的情况下，处理是有利的。虽然层积诱导桃花心木比酸海更好的发芽，但酸海处理去除了毛状花柱，因此种子可以用钻头种植。考虑到已知的钻取plant.ing在土壤中更均匀的优点，在钻取种子可能有效的地方，山桃花心木种子的酸干燥是首选。酸划痕去除的翅膀fourving salthush种子，使它可以钻。雷蒙德·约翰·博伊德，莱登街2090号，丹佛，科罗拉多。此内容于2016年9月18日星期日06：31：48 UTC从 40.77.167.2下载所有使用受 http://about.jstor.org/terms约束
of thesis submitted in partial fulfillment of the requirements for the Degree of Master of Science int Range Management, Colorado A. and M. College, 1954. Attempts to restore browse cover on depleted big ga.me winter ranges by art.ificial reseeding have gen- erally failed. Successful reseeding of browse plants has been handicapped by a lack of information con- cerning methods of trea.ting browse seeds which will induce satisfactory germination. A study wa.s undertaken to compare the relative effeetiveness of two seed treatments, stratificat,ion and acid scarification, in inducing germina.tion of three shrubs: antelope bitte.rbrush (Purshia tridentata), mountain mahogany (Cercocarpus montanus) and fourwing saltbush (Atriplex canescens). Potential germination of these seeds was also determined for comparative purposes by staining embryos wit.h tetra- zolium chloride by the topogra.phic method. Stratifieation was accomplished by placing seed in moist a.cid peat. at temperatures of 310 F. to 41? F. Samples were removed at weekly intervals to deter- mine t.he optimum period of stratification. Acid searifieation was accomplished by placing seed in a copper-sereen basket and suspending in concen- trated sulfuric acid for ten minute intervals up to 90 minutes. The seed were then washed and planted in flats of vermiculite. in four replications of 50 seeds each for germination a,t temperatures of 620 to 770 F. The best period of stratification for bitterbrush was 49 t.o 70 days. After 49 days in stratifieation a few of the seeds began to sprout. The germination of seed stratified for 70 days was 82.5 percent, while non-t.reated seed germinated 1 percent. Acid treat- ment of bitterbrush for a, period of 50 minutes re- sulted in a germinat.ion of 83.5 percent. The best period of stratification for mounta.in ma.- hogany was four weeks or longer. At the end of nine weeks stra.tification, however, a large portion of the seed began to sprout. The germination of seed stratified for 70 days was 71 percent, while non- treated seed germinated 1 percent. Mountain mahogany seed soaked in acid for 60 minutes ha,d the highest germination, 51.5 percent. This figure is significantly higher than the control, but is also significantly lower than t,he germina.tion resulting from stratification. Nevertheless, a.cid seari- fication removes the hairy styles from the seed which would permit the seed to pass readily through a seed drill for more rapid and effective planting. Fourwing saltbush seed does not require stratifica- t.ion so only a.cid treatment was used on these seeds. The germination of seed soaked for 60 minutes was 15.5 pereent, while the control lot germinated 10.5 percent. Staining of the embryos by use of 2,3,5-triphenyl- tetra.zolium chloride proved inconclusive in indicating germination capacity for hitterbrush and mounta,in mahogany. Fourwing saltbush, however, reacted fa- vorably to the stain. The average potential germi- nation of fourwing saltbush as indicated by staining was 41 percent, while the average germination of acid treated seed was 14.75 percent. These' studies show that acid searification of bitter- brush is as effective as stratifica.tion in inducing bet- ter germina,tion. Acid scarification may be accom- plished in less time than stratification, and the treat- ment is advantageous in instances where seed must be treated and planted in a minimum of time. While stratification induces better germination of mounta,in mahogany than acid sea,rification, the latter treatment removed the hairy styles so that seed ma,y he planted with drills. In view of the known advan- tages of drilling in plant.ing seed more uniformly in the soil, acid searification of mountain mahogany seed is to be prefei-red wherever drilling of seed may be effective. Acid scarification removes the wings of fourving salthush seed so that it may be drilled.-Raymond Johk Boyd, 2090 Leyden Street, Denver, Colorado. This content downloaded from 40.77.167.2 on Sun, 18 Sep 2016 06:31:48 UTC All use subject to http://about.jstor.org/terms