发芽率

All the contents of Extractable heavy metal like Pb, Cu, Zn and Cd in limestone slagged wasteland are higher than those in contrapositive soil nearby. The slag filtrate has no effect on seed germination rate of Mung beans, Broad beans and Corns but restrains their germination vigor and protraction of hypocotyls with root restraint rate exceeding 30-50%; While it has an apparent effect on germination rate and germination vigor of sensitive seeds like Beans with P=0.05. Simulate to plant the 4 different seeds in pot for a month, Test groups have a lower data in total leaf area, plant height and weight but a much higher content of protective materials like PRO and MDA in biochemical mensuration experiment compared with CK group.

石灰炉渣废弃地中Pb、Cu、Zn、Cd重金属有效态含量均高于临近对照土壤，其炉渣淋出液对绿豆、蚕豆、玉米3种植物种子发芽率无影响，但均抑制其发芽势和下胚轴伸长，根长抑制率达30%~50%以上，对敏感种子黄豆的发芽率、发芽势（4d）影响明显，摸拟盆栽一个月苗期，4种植物试验组在总叶面积、株高、生物量方面均低于对照组；生理生化测定，4种植物其体内抗逆性保护物质脯氨酸和膜过氧化产物丙二醛含量试验组均高于对照组。

Effects of the physical characters and chemical content of cottonseed on germination and emergence were studied in this paper.

研究了棉子的物理性状及化学营养成分对发芽率和出苗率的影响，结果表明：发芽率与子指存在极显著的正相关r=0。

So worked resistance decrease of grafted cucumber.Grafted cucumber and squash root exudates have the inhibitory effect of germination of cucumber, elongation of root and hypocotyls, and have the same effect on squash.

南瓜和嫁接黄瓜根系分泌物对黄瓜发芽率，胚根胚轴的伸长均具有明显的抑制作用，这种抑制效果与浓度呈正相关；对南瓜发芽率及其胚根胚轴伸长的抑制也达到显著水平，这种抑制效果与浓度同样呈正相关。

The results showed that 0.5g/L petroleum ether extract promoted the germination rate of lettuce; 1, 2, 4, 8 and 16g/L petroleum ether extract had inhibitory effect upon the germination rate, root growth and seedling height of the three plant acceptors.

结果表明，0.5g/L提取物对莴苣种子的发芽率有轻微的促进作用，1，2，4，8和16g/L子提取物对3种受体种子发芽率、幼苗苗高和根系生长均有抑制作用。

To study the effect of different warm water treatment on germination rate, contamination rate and callus rate of seeds containing endophytic fungi, tall fescue seeds were sterilized by water with different temperature (40, 50, 60℃) for different period of time (10, 20, 30 min), as well as sodium hypochlorite solution.

为了研究温水处理对富含内生真菌的高羊茅种子发芽率、污染率和出愈率的影响，以不同温度(40， 50， 60℃)、不同时间(10， 20， 30 min)的温水浸泡和次氯酸钠配合使用处理高羊茅种子，并进行发芽率试验和愈伤组织培养。

Using solution culture experiment, discussed the influnce of nitrobenzene to the germinationrates and seedling growth of ten leguminous crops, and results showed that, when the nitrobenzeneconcentration was 1～100mg·L~(-1), it had little influnce to germination rates of leguminous crops,with the increasing of nitrobenzene concentration, emergence rates of leguminous crops decreased,but no significance compared with control, and found that the toxicity of nitrobenzene toleguminous related with the concentration, the thresholds of nitrobenzene toxicity to differentleguminous crops were different, under the test conditions, the inhibition of root was larger thanhypocotyl, according to the relationship between the inhition rates of root and hypocotyl length andthe nitrobenzene concentration, the sensitive order of the ten leguminous crops to nitrobenzenewas:small-seedsoybean＞kidneybean＞Dongnong42＞brownbean＞Dongnong49＞Dongnong46＞ormosia＞french bean＞black bean＞mung bean.

本研究探索了硝基苯对十种豆类作物的发芽率及幼苗生长的影响，结果表明：硝基苯浓度为1～100mg·L~(-1)时，对豆类作物发芽率影响不大，随着硝基苯浓度的增加，豆类作物出苗率有所降低，但与对照差异不显著，研究发现硝基苯对豆类作物的生物学毒性同浓度有关，硝基苯对不同的豆类作物的毒害阈值不同。

Result:Germination rate of the seeds reached the maxi mal within 8 days at 25℃.

结果在25℃下川党参种子发芽率在第8天达到高峰，在15℃下川党参种子发芽率最低。

Result］ The extracted liquid from D. stramonium could decrease the germination rates of 4 vegetables and the seed germination of tomato and pepper. After treatment by 0.2, 0.4 g/ml extracted liquid , the seed germination of tomato and pepper were decreased by 10.2％, 9.4％ and 46.7％, 34.7％ than that of CK resp. The extracted liquid at 0.2 g/ml could inhibit the growth of vegetable root, but had some promotion on growth of vegetable stem. The extracted liquid at 0.4 g/ml had the strong inhibition on the growth of vegetable root, but its inhibition on growth of vegetable stem was greatly variable in different species.

结果］曼陀罗浸提液可降低4种蔬菜种子的发芽速率，降低番茄和辣椒种子的发芽率；0.2、0.4 g/ml曼陀罗浸提液处理后，番茄和辣椒种子的发芽率分别比对照降低了10.2％、9.4％和46.7％、34.7％。0.2 g/ml曼陀罗浸提液抑制蔬菜根的生长，而对茎的生长却表现出促进作用；0.4 g/ml曼陀罗浸提液对蔬菜根的生长有很强的抑制作用，对茎段生长的抑制作用因物种不同而有很大差异。

Germination percentage of M. adenophora seeds increased to approximately 50% by exogenous application of GA3 at 1000-2000ppm. Furthermore, germination at seeds stratified at 30/20℃ for 4 weeks followed by GA3 treatment increased to 68%.

新鲜的恒春杨梅种子经激勃素GA3 1000-2000ppm处理，可增加发芽率至50%左右，若种子先经30/20℃变温层积4星期，然后再用GA3处理，发芽率可达到68%。

The isolate B9 collected from Jilin province in north China, was the most sensitive to high temperature among the 5 isolates, and only 20%of the conidia of this isolate germinated when treated at 40℃ for 10 min.

采自非洲的菌株M189对高温的抵抗力最强，在40℃处理4小时和50℃处理1小时，孢子的发芽率保持在40%以上，60℃处理20分钟仍有大约1%的发芽率。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。