USE OF INFORMATION SYSTEMS TO DETERMINE PRODUCTIVE, REPRODUCTIVE AND POPULATION PARAMETER IN BUFFALOES AT BUFFALO FARM CALLED LA SUIZA LOCATED AT THE MAGDALENA MEDIO IN COLOMBIA
USE OF INFORMATION SYSTEMS TO DETERMINE PRODUCTIVE, REPRODUCTIVE AND POPULATION PARAMETER IN BUFFALOES AT BUFFALO FARM CALLED LA SUIZA LOCATED AT THE MAGDALENA MEDIO IN COLOMBIA
复制标题
DOI：
--
复制
发表时间：
2012
影响因子：
--
通讯作者：
J. Iqbal;S. Hussain;Ashfaq Ali;A. Javaid
中科院分区：
文献类型：
--
作者：
J. Iqbal;S. Hussain;Ashfaq Ali;A. Javaid
采用完全随机盆栽试验研究了施肥、密度、生育期和温度对莎草生活力的影响。块茎的再生，以及甜菜碱对块茎再生的影响。增加氮、磷肥用量使地上部生物量增加59 - 961%，地下部生物量增加21 - 279%，块茎数量增加50 - 579%，块茎生物量增加21 - 348%。然而，施肥降低了块茎的个体重量。通过增加生长期播种后15、30、75 d的密度、地上部生物量、地下部生物量、块茎数和块茎生物量分别比第一次记录（播种后15 d）增加50 ~ 850%、99 ~ 403%、10 ~ 649%、39 ~ 1122%和22 ~ 982%。块茎在42±3 ℃的高温下晒干4天后，块茎的生活力完全丧失，而在冷冻3小时后，生活力显著下降，此后没有记录到发芽。草甘膦的施用（Round up 490 GL）和百草枯（克无踪）完全杀死地上部生长，与对照相比，块茎生活力分别降低89%和32%。目前的研究得出结论，除草剂草甘膦以及在炎热的五月和六月将块茎暴露在阳光下可以有效地管理紫莎草。
Pottrials wereconductedusinga completely randomized design toinvestigatethe effect of fertilizer s, population density, growing periodandtemperature onviability of purple nutsedge ( Cyperus rotundusL.)tubers,andthe effect of herbicidesonre-generation oftubers. Increase in nitrogen and phosphorus fertilizer rates enhanced shoot biomass by 59 - 961%, underground biomass by 21 �279%, tubers numbers by 50 �579% and tubers biomass by 21 �348%. Individual tubers weight was, however,decreased by fertilizers application. By increasing growth period (15, 30, &,75 days after sowing (DAS))shoot density was increased by 50 �850%, shootbiomass by 99 �403%, under ground biomassby 10 � 649%, tuber numbers by 39 �1122%, and tubers biomass per pot by 22 �982% as compared to the first record of the data (15 DAS).Inpopulationdensitytrials,shootlength, shootand undergroundbiomass, number of tubers per pot and tubers weight were s ignificantly increased up to 15 tubers per pot anddeceasedthereafter.Dryingof tubers in hot sun (42±3∞C)for four days completely lost their viability.viability was significantly decreased up to three hours freezing,and no sprouting was recor ded thereafter.Application ofglyphosate (Round up 490GL) and paraquat (Gramoxone) completely killed the above groundgrowth andreduced the tubers viability by 89% and 32%, respectively,as compared to control. Presentstudy concludes that purple nutsedge caneffectivelybe managed by herbicide glyphosate as well asby exposing the tubers to sun during hot months of May and June.