Department of forest sciences is primarily dedicated to education and research in forest sciences including developing forest ecosystem management, improving forecasts of forest growth and yield, designing cost-effective forest regeneration practices, natural resources management, biometeorology, soil microbiology and biochemistry, horticulture and agronomy, animal science.
森林科学系主要致力于森林科学的教育及研究，其科学领域包括发展中的森林生态系统管理，改良森林生长和生产量的预测，森林重建实践的成本有效设计，自然资源管理，生物气象学，土壤微生物学和生物化学，园艺和农学，动物科学。
The impact of past climate change on crop yield is an effective approach for this research, however, it is difficult to separate the contribution of climate changes and human activities in such studies.
在常规算法的基础上，论文提出一种改进算法，即通过选取基准时段，建立反映气候要素与作物单产关系的函数表达式，来估计非基准时段内的气候产量，这种方法主要适用于气候要素存在趋势性变化的时段。
Its characteristics are: the technology leader in high yield, to stone wash Mak effective water-saving, energy saving, long life and so on.
其特点是：技术领先、产量高、去石洗麦效果好、节水、节电、使用寿命长等特点。
Second, yield identification that is including radish yield and effective root rate.
二是以产量和有效根率的产量鉴定。
The breeding procedure of newwheat variety Changmai 6686 was analysed in this article. The result shows that based on to ensure a certain population heavy ear breeding is an effective path to continue to raise the yield.
通过对长麦6686冬小麦新品种选育经过进行分析，认为在确保一定群体的基础上选育穗重型小麦新品种，是继续提高小麦生产水平的有效途径。
The results showed that length from flag leaf pulvinus to spike base has the largest coefficient of variance of 42.1% and 37.2% in both DS and WW environments, respectively, while the spikelet per spike has the smallest CV of 6.4% and 5.7%. Under different water regimes, spike number per plant, effective spikelet per spike and peduncle length contribute a lot to the stable grain yield. Genetic diversity indices of DTI were from 1.95 to 2.07, with an average value of 2.02. Based on the DTI of agronomic traits, all accessions could be clustered into seven groups, the first and third groups are not sensitive to the water regimes, and the second group is more suitable for planting in dryland.
结果表明：在雨养和灌溉条件下，穗叶距的变异系数最高，分别为42.1%和37.2%，单穗总小穗数的变异系数最低，为6.4%和5.7%；不同水分条件下，植株稳产性主要受单株穗数、有效小穗数及穗下节长的影响；性状耐旱指数的多样性指数在1.95到2.07之间变化，平均值为2.02；根据性状耐旱指数将供试材料分为7个类群，其中第I、第III类群材料表现为对水分条件不敏感，而第II类群材料更适于在干旱条件下种植。
Indicated to a character with theear of character improvement, causes the agronomic characterscoordination proper attention to both, can achieve the high yield andhigh quality highly effective breeding goal.
表明对株型性状与穗部性状的改良，使农艺性状协调兼顾，才能实现高产优质高效的育种目标。
The effects of low (10℃) and room (25℃) temperature on chlorophyll- fluorescence parameters were investigated in the leaves of the alien invasive Wedelia. trilobata and its native congener Wedelia chinensis under high irradiance (1700μmol·m-2·s-1) in order to explore the ecological adaptability of the invasive species to low temperature under high irradiance conditions. The results were as follows: the decreases of the maximum quantum efficiency of photosystem II photochemistry, the effective PSII quantum yield and the apparent electron transport rate in W.
选取入侵植物三裂叶蟛蜞菊及其本地近缘种蟛蜞菊为实验材料，以叶绿素荧光影像仪研究整株植物在零上低温（10℃）和室温（25℃）条件下，强光（1700μmol·m-2·s-1）诱导叶片的叶绿素荧光的特性，探讨入侵种三裂叶蟛蜞菊对强光及温度的响应特性和生态适应性。
The results demonstrated that watergathering of plastic ridging and furrow drilling was effective, senescence of winter wheat was prevented in some extent, had a obvious effect of yield increase and economic increase, and WUE of it was higher than that of conventional flat planting wheat and ridging and furrow drilling wheat.
研究结果表明，与传统平作和起垄沟播相比，起垄覆膜沟播具有较好的聚水保墒效果，一定程度上延缓了小麦的衰老进程，具有明显的增产增收效果；而且水分利用效率明显高于传统平作小麦和起垄沟播。
On the other hand, a low yield of the effective constituents and more other compounds would be leached out from the herbals when a traditional decocting method with water is used.
这一结论对中药生产中应用微波辅助萃取技术和价廉的水作溶剂具有特别重要的意义。
In view of the problems of low nutrient use efficiencyas well as theasynchronism between high yield and sustainable developments. Themechanism of nutrient competition and compensation between the crop rootof 3 different typical intercropping patterns, wheat/soybean, wheat/corn andcorn/cabbage, were studied with field, pot and rhizobox methods, in order toseek the effective ways of promoting nutrient availability and enhancingfertilizer use efficiency.
本文针对目前高产间套种植模式养分利用率不高，高产高效能否与持续发展同步的突出问题，选择小麦/玉米，小麦/大豆和玉米/甘蓝等三种不同的典型种植模式，结合盆栽、根箱微域模拟试验和田间试验，采用隔根法和剖面挖掘法等方法，探讨复合群体根系营养竞争与补偿的机理，寻求促进土壤养分有效化、提高作物对肥料利用率的有效途径。
This paper studied the indirect utilization of the introduced Yugoslavia inbreds through 14 S2 lines from 478×three introduced inbreds and their 56 testcrosses with Chinese elite inbreds belonging to different heterotic groups. The result showed that the Yugoslavia inbreds 9804、9805、9806 were effective in 478 improvement. In the 14 generation lines, the GCA of 3 lines was significantly positive and had great value in breeding. The per –plant yield of 13 crosses was higher significantly than check by 4.55%-33.28% in the 56 testcrosses.
本研究通过对14个（478×外引系）后代选系与国内属于不同优势类群的8个骨干自交系杂交组配的56个测交组合的配合力和杂种优势研究结果表明：利用南斯拉夫自交系9804、9805、9806改良478是可行和有效的，在14个（478×外引系）优良后代选系中，有3个选系的GCA为显著和极显著正值，具有较高的直接组配利用价值。
The best result was observed with treatment of 4.5 g HMWPT per plant. HMWPT application improved tobacco root growth, increased effective leaf number and stem width, increased leaf yield 15.4% and output value 3345 yuan/hm^2, increased soil capability of conserving water and nutrients, and soil nutrient availability as well.
结果表明，在湘西北烟区，烤烟每株施用4.5g烟草专用高分子聚合物效果最好，能够促进烟株根系的生长发育，增加叶片数，增粗茎围，提高产量15.4%，增加产值3345元／hm^2；同时增加土壤保水、保肥能力，提高土壤养分的有效性。
The most effective way of Gastrodiae cultivation in Yichang is to set up breeding plantation at the altitude of 1000m, hybriding area at 100m, seed multiplication farm at 500m and GAP base for commercial gastrodiea at above 800m. In this way, the cultivating period of sexual seed tubers was shortened by 12 months and 12 months was saved for the cultivation for commercial tubers both with good quality and high yield. Besides, two novel hybrid species- Er No 1 and No 2 Gastrodiae were obtained by conforming the florescence of G. elata Bl. f. elata and G. elata Bl. f. glauca S.
在湖北宜昌海拔1000m以上建立品种园，100m左右建杂交区，500m左右建良种场，800m以上建商品麻GAP基地最为经济有效：将有性种麻培育期节省了12个月，将有性乌天麻商品麻的生产周期节省了12个月，且保持优质高产；调控乌天麻与红天麻花期相遇，培育出鄂天麻1号、2号两个优良杂交新品种。
Sugarcane mosic virus disease and sugarcane ratoon stuning disease harmful greatly on the yield and quality of sugarcane cultivation are widespread in the world. There is no any specific drug can control these diseases at present. Production and application of disease-free seed canes is an effective solution to control these diseases.
甘蔗花叶病(sugarcane mosic virus disease，SCMV)和宿根矮化病(ratoon stuning disease，RSD)是世界范围内广泛发生的两种病害，对甘蔗产量和品质造成重大影响，当前尚无特效药，生产上采用脱毒的健康种苗是控制这些病害的有效措施。
This study includes six parts: the effects of soil remediation on Glehnia Littorali/ absorptive capacity, chlorophyll content, main effective components content and yield, and the inducing effects of soil remediation on Glehnia Littorali^s defence enzyme activity and heat shock protein.
本论文从土壤调理剂对北沙参的土壤养分吸收、叶绿素含量、主要有效成分含量及产量的影响及对北沙参防御酶和热激蛋白的诱导效果六个方面进行了研究。
The results showed that effective applied concentration of Zn fertilizer ranges from 200 to 600 mg/kg and optimum concentration ranges from 200 to 400 mg/kg which can promote grass photosynthesis and enhance seed yield, Combined Application of Zn, Mn and Mo can not only enhance photosynthetical ability and seed yield, but also promote forage production significantly (increasing by 11.8%) under the concentration of 200 mg/kg, 500 mg/kg and 300 mg/kg for Zn, Mn and Mo respectively.
研究证明：Zn肥对鸡脚草和百脉根混播草地的有效范围集中在200~600mg/kg之间，最佳利用浓度为200~400mg/kg，能够促进牧草光合作用和提高种子产量，对牧草生产没有影响。200mg/kg的Zn肥与500mg/kg Mn肥和300mg/kg的Mo肥三者配施下，不但提高牧草的光合能力和种子产量，而且也显著地提高牧草产量（11.8%）。
It is confirmed as an effective approach to manage eutrophicated lake by planting in water technology, but the popularization of the technology is difficult because of lower crop yield.
利用水上种植技术治理湖泊富营养化已被证明是一种行之有效的方法，而提高作物产量一直是阻碍该技术普及的一个难点。
Tim's calculations were right: He's getting an effective dividend yield of roughly 3, 017%.
添的计算是正确的：他越来越有效红利收益率约3017%。
The analyses of combining correlation, direct effects and indirect effects showed that direct selection for the number of fruits, collar diameter and hundred-seed weight would likely be effective in increasing seed yield. It is logical to select plants with lower height of bearing branches for the improvement of seed yield.
相关、直接作用和间接作用相结合的分析表明，对果实数、地径和百粒重的直接选择可有效增加种子产量；选择结果枝高度低的植株对种子产量改良有益；结果枝数和结果枝比的选择有助于提高种子产量，因其通过果实数和地径的间接作用较大。