The dynamic change of NH4+, NO3- and TN, under the situation which urea was applied in the high fertility paddy-field in Yuhang of Hangzhou city with a lysimeter which was designed and made by ourselves, was studied and analyzed in order to find the rules of the change in the water-body of surface and the leakage rule of nitrogen, to reduce the effect of nitrogen loss on the water pollution.

借助自行設(shè)計(jì)制作的稻田滲漏計(jì)，在杭州余杭對(duì)高肥力稻田不同施用尿素氮肥情況下免费观看黄色视频的网址，稻田地表水和滲漏水中銨態(tài)氮美女张开腿让男人桶爽动漫视频、硝態(tài)氮和總氮的動(dòng)態(tài)變化規(guī)律進(jìn)行了研究分析，以利于發(fā)現(xiàn)氮素在地表水體變化和淋失規(guī)律免费久久性爱视频，盡量減少氮素淋失對(duì)地下水體所造成的影響有什么好看的在线看黄色网站。

The kinetics of degradation of healthy paddyfield ecosystem due to unreasonable fertilization are as follows.(1) The rice growth was interfered and the structure of microbe population was altered through applying excessive nitrogen fertilizer, while the yield of rice was decreased later and the secretion was reduced from rice root, which induced the Eh and the quantities of Bacterium and Actinomycetes declining, and the contents of MBC, MBN, MBP low in the soil. All of that made the capacity of accommodating nutrient weak in microbe ecosystem.

不合理施肥引起的稻田生態(tài)系統(tǒng)退化的動(dòng)力學(xué)特征是：(1)重施氮肥首先使水稻植株生長(zhǎng)受阻，同時(shí)改變土壤微生物種群結(jié)構(gòu)黄色视频免费在线无码观看，從而直接使水稻產(chǎn)量降低欧美自拍日韩专区在线，稻田土壤生產(chǎn)力受損，并產(chǎn)生一系列不良次級(jí)反應(yīng)：水稻生理活動(dòng)減弱減少了根系分泌量亚欧日本VA中文字幕久久，同時(shí)也降低了土壤Eh日本香蕉视频在线观看，使稻田土壤細(xì)菌、放線菌數(shù)量降低日本欧美熟妇色一本在线视频，MBCav网址国产、MBN以及MBP含量下降，微生物保肥欧美三p、供肥能力降低97在线视频人妻无码一期，從而土壤微生物生態(tài)系統(tǒng)功能弱化。

So this technique lets us produce rice and duck meat of non-pollution and softy in the limited rice field space.

項(xiàng)目簡(jiǎn)介：稻鴨共作技術(shù)將雛鴨放入稻田18岁禁看的黄片，利用雛鴨旺盛的雜食性sesesese，吃掉稻田內(nèi)的雜草和害蟲(chóng)，利用鴨不間斷的活動(dòng)刺激水稻生長(zhǎng)国内自拍av偷500拍视频，產(chǎn)生中耕渾水效果91精品夜夜夜一区二区，同時(shí)鴨的糞便作為肥料，最后連鴨本身也可以食用日韩十八禁视频，在稻田有限的空間里生產(chǎn)無(wú)公害亚洲天堂无码人妻在线影院，安全的大米和鴨肉。

The age structure of striped stem borer, Chilo suppressalis, overwintering in different type of rice fields and wild rice fields was investigated, and post winter feeding and pupation dynamics were compared among larvae in different instars.

調(diào)查了不同類型稻田及茭白田中二化螟的越冬年齡結(jié)構(gòu)污污网址免费观看，比較了不同齡期幼蟲(chóng)之間在冬后取食與化蛹動(dòng)態(tài)方面的差異黃色A级毛片永久免费。結(jié)果表明，越冬蟲(chóng)齡以雙季晚稻田中明顯較低欧美黄色一级A片视频，中稻田與茭白田中相對(duì)較高2021年国产精品久久。

This article studied the characteristics of substance and energy in rice-duck-azolla integrated farming system. RDA system increases food-chain complexity and system stability because ducks and azolla are incorporated into rice paddy systems.

對(duì)稻鴨萍共作生態(tài)系統(tǒng)物能流特征的分析結(jié)果表明，通過(guò)在稻田生態(tài)位添加鴨子和綠萍，使原來(lái)的稻田食物鏈結(jié)構(gòu)趨向復(fù)雜化黄色免费啪啪小电影网站，增加了稻田生態(tài)系統(tǒng)的穩(wěn)定性思思热在线观看视频。

In order to determine organic storage and its space distribution characteristics in paddy field of region, on the basis of second soil survey database, the space databases in unit of soil local type were set up by adoption Arcview software, integrated with GIS software, basined on soil type methods and region scale, the distribution of soil organic carbon storages in purple paddy soil of Chongqing were investigated. The results showed that the storage of SOC in Banan district of Chongqing was 6.48×10^6 t and average SOC density in Banan district with 8.31 kg/m^2 was higher than that of China.

為了明確區(qū)域稻田土壤碳庫(kù)蓄積量及其空間分布特征，以全國(guó)第二次土壤普查數(shù)據(jù)資料為基礎(chǔ)吉泽明步绝顶高潮喷水3小时，運(yùn)用地理信息系統(tǒng)軟件Arcview建立研究區(qū)以土種為單位的空間數(shù)據(jù)庫(kù)日韩欧美图片，結(jié)合GIS空間分析功能，基于土壤類型法估算重慶市巴南區(qū)稻田土壤有機(jī)碳儲(chǔ)量及其空間分布特征国产色色激情，結(jié)果表明：研究區(qū)稻田土壤有機(jī)碳總儲(chǔ)量約為6.48×10^6t日日射日日插日日干，平均土壤有機(jī)碳密度為8.31kg/平方公尺，略高于全國(guó)平均水平91视频一级片。

The total seed storage in topsoil (0-10 cm) was 83499-109141 indm^(-2) for natural wetlands and 9140-47452 indm^(-2) for reclaimed paddy fields. In natural wetlands, the seeds were of 16-30 grass plant species, being dominant with Polygonaceae and Cyperaceae or Cyperaceae and Gramineae; while in reclaimed paddy fields, the seeds were of 7-16 grass plant species, with the dominant of Gramineae. The seed storage and species numbers were greater in Shengjin Lake than in Shibasuo Lake. Higher seed bank storage and more species were observed in the paddy fields from Shibasuo wetland with 30 years of cultivation than from the Shengjin Lake wetland with over 50 years of cultivation.

結(jié)果表明：天然濕地種子庫(kù)密度為83499~109141粒m^(-2)在线观看免费毛片高清，而開(kāi)墾為稻田30~50年后種子庫(kù)密度為9140~47452粒m^(-2)；天然濕地的土壤種子庫(kù)物種數(shù)為16~30種人人摸'人人操人人，以蓼科－莎草科或莎草科－蓼科為優(yōu)勢(shì)種，開(kāi)墾為稻田后物種數(shù)下降為7~16種中国区第一黄色网，且趨向于以禾本科為單一優(yōu)勢(shì)種久久精品国产字幕AV；此外，與十八索濕地相比美国黄色视频黄色视频聊天，升金湖濕地有較高的土壤種子庫(kù)物種數(shù)6080新觉伦午夜理论无码、豐富度和多樣性，而開(kāi)墾年限為30年的十八索稻田土壤種子庫(kù)物種數(shù)和豐富度顯著高于開(kāi)墾年限為50年的升金湖稻田超碰91成人人做人人爱。

Richness of phytophagous insects was also high but its individual number and dominnant concentration were low.

同時(shí)多樣化生境稻田中的植食性昆蟲(chóng)亞群落的物種豐富度高于單一生境稻田最新国产三級片，但其數(shù)量和優(yōu)勢(shì)集中性低于單一生境稻田。

In order to study the impact of rice-duck farming ecosystem on zoobenthos biodiversity in paddy waters, surface soil samples taken from rice-duck farming ecosystem and conventional paddy fields were analyzed for zoobenthos biodiversity.

在水稻不同生育時(shí)期對(duì)稻鴨共作稻田和常規(guī)稻田的土壤取樣亚洲爆乳少妇无码激情，研究不同稻田生態(tài)系統(tǒng)水體底棲動(dòng)物的生物多樣性无遮无挡爽爽免费视频毛片。

Shannon-Wiener diversity index, Simpson diversity index and evenness index all show similar trend of change. The diversity indexes and evenness index of zoobenthos in rice-duck farming ecosystems are higher than those in normal paddy during the early stage of rice growth, but are in the reverse trend during the later stage.

水稻各生育時(shí)期常規(guī)稻田和稻鴨共作稻田底棲動(dòng)物的Shannon-Wiener多樣性指數(shù)、Simpson多樣性指數(shù)和Pielou均勻度指數(shù)變化趨勢(shì)相似亚洲天堂免费看，均為水稻生育前期稻鴨共作稻田的生物多樣性指數(shù)和均勻度指數(shù)高于常規(guī)稻田午夜视频www，而后期低于常規(guī)稻田。

Acrocephalus agricola：稻田葦鶯

685 圓翅葦鶯 Acrocephalus concinens | 686 稻田葦鶯 Acrocephalus agricola | 687 小蝗鶯 Locustella certhiola

cornfield：稻田

cornfield 玉蜀黍田 | cornfield 稻田 | cornflakescornmealsamp 玉米片

cold bed on rice field：稻田冷床苗圃

cold bed on dry field 旱田冷床 | cold bed on rice field 稻田冷床苗圃 | cold bed rice seedling 水田冷床苗

paddy field：稻田

paddy 稻谷 | paddy field 稻田 | paedogamy 幼體接合

paddy field：稻田,水田

paddy case-bearer 稻三點(diǎn)水螟 | paddy field 稻田,水田 | paddy field boat 水田船,水田機(jī)耕船

paddy soil：稻田土壤

水稻種子:Paddy Rice seed | 稻田土壤:paddy soil | 稻田土壤:Paddy soils

paddyfield：稻田

paddy 稻 | paddyfield 稻田 | paddywhack 生氣

terraced rice field：階地稻田

terraced paddy field 階地稻田 | terraced rice field 階地稻田 | terracing 階田耕作

Oryzorictes：稻田猬屬

稻田猬亞科 Oryzorictinae | 稻田猬屬 Oryzorictes | 稻田猬 O.hova

Oryzorictinae：稻田猬亞科

刺頭無(wú)尾猬 E.telfairi | 稻田猬亞科 Oryzorictinae | 稻田猬屬 Oryzorictes