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.

供試的6種雜草對該混劑的敏感性存在顯著差異：紅心藜Chenopodium album在线观看h一区、龍葵Solanum nigrum和反枝莧Amaranthus retroflexus對該混劑最敏感亚洲永久免费视频在线，ED90值分別為47.65免费的a级片、71.67和29.17g/hm291popny丨九色国产；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分別為96.91人人搞人人操人人叉一、114.20g/hm218岁禁污网站；而番茄不敏感。

The present study investigatated the effect on the diversification of weed community, including weed abundance, dominance, evenness, biomass, and mean height after mulching straw and intercropping white clover in the tea plantation from 2005 to 2006. The results were as follows: 16 families and 31 species were found in total. In April, the dominant species characterized with slow growth, lower biomass, and less than 30 cm height; in July those who grow faster with higher biomass and height became dominant; In September, these malignant communities reduced, while the oxalis and diffusa characterized with lower biomass and low height gradually increased. In the three seasons, the weed abundance, community diversity and evenness increased, and the dominance, the biomass and average height of weeds remarkably reduced after intercropping white clover and muching straw.

結(jié)果表明：茶園共有雜草16科31屬31種男女激情猛烈无遮挡在线观看，春季（4月）以生長速度較慢97在线视频人妻无码一区、生物量小、株高在30 cm以下的雜草為主日本天堂网黄在线，夏季（7月）以生長快人人人操97、植株高和生物量大惡性雜草為主，秋季（9月）惡性雜草開始減少激情电子书图片，酢漿草欧美一级高清a视频永久免费、白花蛇舌草等生物量小、株高矮的雜草逐漸增多久久不见国模高清大胆人体艺术私拍吧；稻草覆蓋處理茶園春www交毛片、夏和秋季3個觀測時期雜草物種豐富度、多樣性国产一级AV网站、均勻度等指數(shù)均高于清耕對照伊人亚洲精品分类视频，優(yōu)勢集中性指數(shù)低于清耕對照；間種白三葉草處理春求一级黄色网站、夏和秋季3個觀測時期雜草總數(shù)量和生物量均顯著低于清耕對照欧美湿身诱惑超碰在线，夏、秋季雜草平均株高顯著低于清耕對照2019偷拍黄色视频精品；稻草覆蓋和間種白三葉草處理春季茶芽重和產(chǎn)量顯著高于清耕對照，鮮葉中游離氨基酸含量高于清耕對照a片黄这线免费观看1区，茶葉感官評審得分高于清耕對照處理1024国产视频精品欧美一区。

The spraying control system aiming at weed based on machine vision was designed and developed. The index of 2G-R-B is used for segmentation and the method of improved pixel lateral histogram is used for extracting the center of crop row,the method of threthold is also used for identificating between-row weed and BP ANN based on fratal and texture is used for identificating in-row weed. PLC correspondence and performing procedure is desi -gned and developed.

設(shè)計和開發(fā)了基于機器視覺的麥田除草劑對準(zhǔn)噴藥控制系統(tǒng)，該系統(tǒng)的視覺子系統(tǒng)首先用過綠的2G-R-B進行植物與土壤背景的分割肏屄手机视频播放，其次用改進像素直方圖法識別作物中心行国产午夜一级福利毛片视频6，用閾值法識別行間雜草區(qū)域，用BP神經(jīng)網(wǎng)絡(luò)基于分形和紋理的共同特征識別行內(nèi)雜草區(qū)域日本视频www.色，設(shè)計并開發(fā)了計算機與PLC的通信程序射欧美综合，設(shè)計了PLC的運行程序。

The color component of ir was the best for close operation while the other two color component (r+g and r+g+ir) would do a better performance on open operation. Finally, the results of these 3 color components for recognizing weed showed that ir was the best. So, as a conclusion, the color component of ir is best for recognizing weed based on computer vision. Also the operation process for recognizing weed was proposed.6. Supposed an idea on the variable spray mechanism of weedicide.

借助Matlab7.0.1軟件對數(shù)值量ir和數(shù)值組合r+g欧美日韩A、r+g+ir進行進一步的分析欧美性天堂2019，在對ir久久综合九色综合久99、r+g、r+g+ir圖像完成為了去除圖像噪聲而進行的中值濾波和二值化背景分割后91久久精品无码一区二区毛厂片，為消除特定圖像細(xì)節(jié)進行二值形態(tài)學(xué)操作人人妻,人人操,人人爱人人乐，通過分別對三個數(shù)值量和數(shù)值組合的開啟和閉合操作結(jié)果的比較，發(fā)現(xiàn)處理后的數(shù)值量ir適合進行閉合操

This weed population had a wider niche breadth, the second widest among 12 major weed populations in weed community, and had bigger niche overlap with Stellaria alsine, Alopecurus acquallis, Malachium aquaticum, Poa annua, Polygonum persicaria and Lapsana apogonoides. In rape, wheat or fallow, B.

在雜草群落中人人睡人人操人人上，草的生態(tài)位寬度居第2位色色屋视频APP下载，說明其有潛在的較強的適應(yīng)環(huán)境的能力；草與雀舌草国产极品福利精品小视频、看麥娘亚洲av日av、牛繁縷、早熟禾午夜操逼视频、春蓼和稻搓菜等雜草種群的生態(tài)位重疊較大538免费精品视频，與它們的生態(tài)要求比較接近。

The main achievements of the project are as follows: 1 the hypothesis that a decrease in seed mass causes an increase in mean dispersal distance has been tested based on the experiments of weed dispersal by wind. The experimental results partly support the hypothesis. The results will help farmers to make an optimal strategy of weed control; 2 a statistic method for inferring probabilistic distribution function of a random variable has been developed, by which probabilistic distribution functions of weed species dispersal have been determined; 3 the reproduction structure of Bromus sterilis has been studied; 4 a more complex CA model with 25 neighborhood cells were built, which can simulate spread of a weed population. This work promotes developments in both theory and application of CA models; 5 the "mean law" in weed control has been proposed. Accordingly, the algorism of patch spring may be calibrated; 6 the "patch" and "true patch" have been mathematically defined so that herbicide can be efficiently applied; 7 simulation validates that initial configurations of weed will affect dispersal of its population and strategies of controlling it, or its distribution patterns affect its dispersal progresses.

主要完成的工作和取得的成果有：1）用實驗證實了重量較輕的雜草種子并不一定飛得比較重的遠(yuǎn)大学情侣酒店，其結(jié)果有助于農(nóng)民制訂雜草的優(yōu)化控制策略日日摸日日碰日日添夜夜爽；2）發(fā)展了一種推斷隨機變量分布函數(shù)的統(tǒng)計方法并用它來獲得了幾個雜草種的擴散分布函數(shù)；3）對雜草Bromus sterilis的繁殖結(jié)構(gòu)進行了研究黄页网在线观看视频大全；4）建立了一個具有25鄰的較復(fù)雜的能模擬雜草擴散的CA模型欲色天天婬香婬色综合网，并在理論和應(yīng)用方面促進了CA模型的發(fā)展；5）在雜草控制方面提出了&平均法則&最新永久福利地址发布页，據(jù)此可對按塊施藥方法進行校正国产激情交换3pi在线看；6）精確地定義了&塊&和&真塊&以便在雜草控制中能更有效地使用除草劑；7）模擬證實雜草種群的初始配置影響其擴散和控制策略免费一级欧美性大片口咬，或者格局影響過程黑人玩弄人妻一区二区三区。

Using nuclear DNA C-values for 539 angiosperms in China, we examined the variation of these values among growth forms and taxonomic groups and the relationship of these values with invasiveness. Mean DNA C-value of the 539 angiosperm species was 4.06 pg. Mean DNA C-value was(1) significantly lower for woody species (1.84 pg) than for herbaceous species(5.02 pg);(2) significantly lower for 360 dicots (2.20 pg) than for 179 monocots (7.80 pg);(3) significantly lower for annuals (2.78 pg) than for perennials(6.65 pg);(4) significantly lower for 134 weed species (1.93 pg) than for herbaceous non-weeds (6.75 pg) and for several families that have an unusually high proportion of weed species;(5) significantly lower for 47 exotic weed species (1.76 pg) than for 134 native weeds (1.93 pg), but significantly lower than that of "non-weedy" herbaceous species (6.75 pg);(6) lower for weeds than for "non-weedy" species in same genus or family; and (7) in herbaceous species, generally lower for weedy compared to "non-weedy" species, with some exceptions such as Avena fatua, whose DNA C-value is as high as 14.15 pg, contrarily, and some "non-weedy" herbaceous species in Cruciferae and Cucurbitaceae with very low values.

統(tǒng)計了中國境內(nèi)有分布的539種被子植物的DNA C-值，分析了它們在不同分類群国产精品无码专区、生活型另类专区第一页、倍性、生活史類型以及在雜草和非雜草類群中的分布情況日韩免费一区二区三区高清，主要結(jié)果如下：(1)539種被子植物DNA C-值平均為4.06 pg欧美性爱aaaaaa图片，其中木本植物的DNA C-值平均為1.84 pg，低于草本植物的平均值(5.02 pg)毛片免费全部播放无码私人；(2)雙子葉植物(360種)的DNA C-值平均為2.20 pg在线永久观看的黄色网站，極明顯地小于單子葉植物(179種)的平均值(7.80 pg)；(3)1年生植物的DNA C-值平均為2.78 pg黄色一级大片网站，明顯小于多年植物的平均DNA C-值(6.65 pg)免费三级自拍偷拍电影视频网；(4)134種雜草的DNA C-值平均為1.93 pg，明顯小于非雜草草本植物的平均值(6.75 pg)又爽又黄又刺激的网站，含雜草較多的科91国在线精品国内播放，平均DNA C-值相對較腥巳嗣巳松巳瞬佟；(5)統(tǒng)計的47種入侵雜草的DNA C-值平均為1.76 pg婷婷网五月天天综合天天爱，略小于134種雜草的平均DNA C-值(1.93 pg)A片在线视频兔费观着网址，極顯著地小于非雜草性草本植物(6.75 pg)；(6)以科為單位800Avocm，不同科的DNA C-值存在著極大的差異国产又爽又黄又湿免费99；(7)DNA C-值與染色體倍性的關(guān)系并不明顯，但是www.spdbyt.com，隨著倍性的增加亚洲天堂在线综合，基因組變小一级黄色网站一；(8)在同一科人人艹在线免费、屬中，與非雜草相比www.99riav3.c鈥唌，典型雜草的DNA C-值往往偏?1网址在线观看播放。?9)總體上雜草或雜草性強的植物中文字幕手机在线观看第一页，它們的DNA C-值比非雜草性植物的要小加勒比黄色网站。

Variation of important value of dominant weed is that in spring and fall the dominant weed is Viola prionantha while in summer it is Digitaria ischaemum. In general management lawn community it is Leymus secalinus that is the dominant weed in spring and fall and Digitaria ischaemum in summer.

管理水平較差的草坪群落中，春季和秋季是早開堇菜占優(yōu)勢淫荡网国产人人，夏季是止血馬唐占優(yōu)勢欧美最猛性高清免费AA片；管理水平一般的草坪群落中春、秋季節(jié)是賴草占優(yōu)勢高清免费毛片，夏季也是止血馬唐占優(yōu)勢黄色网站真人版；管理水平較好的草坪群落中整個生長季是鼠掌老鸛草、鵝絨委陵菜国产区视频综合影院、賴草占優(yōu)勢色色视频久久激情，且以鼠掌老鸛草的優(yōu)勢度最大。

When the mevinphos was utilized for a long time in highland barley field, the young-root of next-season cole shortened 1.9~2.0cm and fresh weight decreased 0.13~0.14g per individual plant compared with the control. Low-tillage in time after autumn-harvest showed that the weed seeds in the ground surface were harrowed into the tilth of 0~10cm. Early-low-tillage in spring-sow of the next year induced weed seeds of soil surface to germinate and come out ahead. After 10 days, tillage-sow can decrease about 40% weeds. Compared to the normal plough-row, direct late-tillage-row was postponed 10 days, and can decrease about 30% weeds. In the seedling period or later, rudimental weed seeds were handled with a hoe, which led to better cure and control effects and had more benefits to the young seedling growth and yield of the next-season crop.

研究結(jié)果表明：氟樂靈在油菜田長期使用時免费观看国产线上视频，土壤殘留農(nóng)藥抑制下茬青稞幼根生長美女视频在线网站，幼根較對照株縮短3.0~3.1cm/株，鮮重量減少0.19~0.20g/株无码在线第一页；甲磺隆在青稞田長期使用時，下茬油菜幼根較對照株縮短1.9~2.0cm/株情欲综合，鮮重量減少0.13~0.14g/株女人插插插视频；秋收后及時淺耕可將落入地表的雜草種子全耙入0~10cm耕層內(nèi)；翌年春播早淺耕可誘發(fā)土壤表層的雜草種子提前萌發(fā)出苗日韩精品乱码一区二区在线视频，10d后耕種www.免费视频com，能防除40%左右的雜草株數(shù)精品69视频一区二区三区；較正常播種期推遲10d后直接晚耕播種，可防除30%左右雜草株數(shù)91欧美精品激情在线；苗期或后期拔出殘余雜草種子時国产一区二区熟女，除草效果理想，對下茬作物幼苗生長發(fā)育及產(chǎn)量無任何不良影響日韩午夜网页在线观看视频。

As one kind of the extensive weed killer, Glyphosate is one of the biggest global output agricultural chemical original drug weed killer. It occupies the entire weed killer market 30 % and the first world pesticide sales in continuously many years.

中文摘要嘉磷塞是目前全球產(chǎn)量與使用量最大之殺草劑農(nóng)藥韩国三级电影网址，嘉磷塞作為一種廣譜滅生性殺草劑，占整個殺草劑市場總量的30%超碰免费在线91，連續(xù)多年占據(jù)世界農(nóng)藥銷售額首位久久精品这里只有精品久久。