The results showed as follows:(1) the de-farming index of 479 investigated farm households is 79.21% with per capita area of de-farming slope farmland of 0.205 hm~2,per capita grain yield loss resulted from de-farming slope farmland of 74 kg and per capita allowance of 171 yuan from the government in 2003;(2) the de-farming allowance from the government has a bigger influence on a poor household,and if an allowance from the government would be stopped,the re-exploitation of partly de-farmed slope farmland is possible;(3) in 2003,per capita cash income of 479 investigated farm households is 1 492 yuan,and its sources mainly from floating employment,selling grain and greenstuff,de-farming allowance,selling products of domestic livestock and poultry and dealing dicker etc.;(4) in a few coming years,those employments of stable and higher earning will be firstly selected by farmers,and high expected value agriculture or rural commerce are going to become the leading livelihood of a good few farmers with some fund or skill.

結(jié)果表明：被調(diào)查農(nóng)戶人均退耕坡地0.205 hm2欧美自拍日韩极速播放在线观看视频，退耕指數(shù)達79.21%女人18毛片一级毛片亚洲；2003年479農(nóng)戶因退耕導致的糧食減產(chǎn)量人均74 kg日韩欧美视频在线看，得到政府補貼人均171元a欧美亚洲电影图片迅雷下载；退耕補貼對貧困農(nóng)戶的影響程度較大黄色网页直接看，停止退耕補貼后存在反墾可能性。2003年被調(diào)查農(nóng)戶人均現(xiàn)金收入1492元欧美色综合,色综合，主要來源于外出打工你懂网站在线观看、賣糧菜、退耕補貼、賣畜禽產(chǎn)品和做小生意等a级国产大黄视频。未來幾年色屋永久无域名无码视频网站，能獲得穩(wěn)定收入且報酬相對較高的行業(yè)是農(nóng)民謀生的首選，有資金積累或一定技能的農(nóng)戶正在將生計轉(zhuǎn)向高附加值農(nóng)業(yè)或第三產(chǎn)業(yè)国产黄网站在线观看免费版。

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種国产97av，春季（4月）以生長速度較慢、生物量小一级A爱视频免费看、株高在30 cm以下的雜草為主久久久综合，夏季（7月）以生長快、植株高和生物量大惡性雜草為主18禁漫画网站，秋季（9月）惡性雜草開始減少十八岁一上看的黄片，酢漿草、白花蛇舌草等生物量小欧美巨屌性爱、株高矮的雜草逐漸增多迷奸视频网站；稻草覆蓋處理茶園春、夏和秋季3個觀測時期雜草物種豐富度美女免费黄色网站a、多樣性亚洲国产一区区三区在线播放、均勻度等指數(shù)均高于清耕對照，優(yōu)勢集中性指數(shù)低于清耕對照美女黄色视；間種白三葉草處理春国内视频偷拍网站、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，夏亚洲综合激情另类小说、秋季雜草平均株高顯著低于清耕對照国产欧美视频一区二区色老头影视；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黄色美女视频软件，茶葉感官評審得分高于清耕對照處理91亚洲精品福利视频。

In this experiment, there was no significant difference between R and H treatment. The soil pondage of Z treatment was less than that of R and H, which indicated that Z treatment was disadvantageous to soil water infiltration under irrigation conditions because Z was covered by straw and had high density.

模式之間比較，旋耕和耙耕模式土壤貯水量差異不顯著亚洲视频在线88888，免耕模式小于旋耕和耙耕模式搜索黄片搜索黄片黄色毛片，表明在灌溉條件下，免耕模式由于地表秸稈覆蓋加之土壤表層容重變大色综合久久天天综合绕视看，不利于土壤水分的下滲日韩在线欧美成人网。

Soil bulk density of Z treatment was gradually increased in three years, which was significantly higher than that of C treatment in 0~20cm soil layer. 2.2 Effects of tillage systems on soil moisture content There was significantly positive correlation between soil pondage and rainfall of the same period in R, H and Z treatments, and the correlation coefficient was higher than C, especially the H treatment, its correlation coefficient was 0.70**, which reached a highly significant level, and its soil water retention was better than C.

免耕模式土壤容重在0~20cm均逐漸增高，最終顯著高于常規(guī)耕作模式国产AV妓女影院妓女影视。2.2耕作模式對土壤水分的影響 0~20cm土層旋耕插插国产、耙耕和免耕模式土壤貯水量與同期降雨量顯著正相關(guān)，相關(guān)系數(shù)皆大于常規(guī)耕作模式亚洲真实迷奷系列在线观看，耙耕相關(guān)系數(shù)為0.70**超碰在线妓女，達到極顯著水平又粗又大又长又硬起来了，土壤保水性好于常規(guī)耕作模式。

The NT increase the Gliadin, Globulincontent and decrease the Glutenin, Albumin contents compared with CT.1.3 In NT, 7 days after anthesis and in the sequel, flag leaf NR activityshows higher, photosynthetic ration and transpiration ratio 16 days after 5anthesis and in the sequel higher and have longer continuance ability thanthose in CT.1.4 In NT, total nitrogen contents in crop and fertilizer utilization efficiencyare lower than those in CT.2 The ecology characteristics of wheat field of NT2.1 The contents of hydrolyzable nitrogen,available phosphorus andpotassium in 0-20cm soil layer are all higher in NT fertilization zone thanthose in CT, While the differentiations are in different levels.

肥料利用率免耕各處理均顯著低于常規(guī)處理亚洲肏穴。1.5 和常規(guī)耕翻處理相比欧美三级高清在线，免耕處理玉米秸稈腐解率無顯著差異。冬前是秸稈腐解的主要時期久久伊人青草。小麥生育后期肥料對秸稈腐解的促進作用顯著AAAAAAAAA性关系视频，肥料用量與秸稈腐解率存在顯著相關(guān)性。2 免耕對土壤理化性狀的影響2.1 在成熟期免耕施肥區(qū)国产主播第一页，和常規(guī)耕翻處理相比91专区亚洲，免耕處理 N3T 對0-40cm 土層堿解氮含量影響不顯著女人自啪啪一级毛片。免耕處理 N3T 顯著提高了 0-20cm 土層土壤速效磷和速效鉀含量美女福利国产精品免费观看，對 20cm 以下土層速效磷和速效鉀含量無顯著影響。

The area of our cropland will decrease,and will harm the food security;The needed quantity of farming land by the year of 2020 is discussed in the article under the four fallow patterns :the seriously polluted faming land;the farming land with low output;the farming land of soil erosion and follow by crop rotation.

休耕會使耕地面積減少欧美色精品视频欧美精品色，對我國的糧食安全造成不利影響女人被叉视频；文中闡述了在污染嚴重的耕地休耕、中低產(chǎn)田休耕久99久人碰人、水土流失嚴重的耕地休耕以及采用輪作休耕4種不同模式下到2020年我國所需要的耕地保有量免费一级黄色。

Other data indicate that the block冬耕winter irrigation, cotton bollworm overwintering pupae in about 80% of mortality, not only cultivated the land irrigated winter mortality rate of 60% to 70%, non-cultivated non-irrigated land, only 30% of the ~ 40

另有資料表明，冬耕冬灌的地塊aaaaa黄色网址，棉鈴蟲蛹越冬死亡率在80%左右人人草人人爽，只耕不灌的地塊越冬死亡率為60%～70%，不耕不灌的地塊只有30%～40

Result When refer to the different tillages, the difference in CH4 emission flux between CTS and RTS was little during the early rice growth, but they were much more than NTS. During the late rice growth the CH4 emission flux of RTS was much more than CTS and NTS.

在秸稈還田情況下亚洲色图在线欧美，早稻生長季旋耕和翻耕的CH4排放量差異不大国产福利在线观看免费第一福利，但顯著高于免耕；晚稻生長季旋耕CH4排放量顯著高于翻耕和免耕美女黄片视频大全；冬閑季節(jié)各處理CH4排放量較小美美女一级A片视频，翻耕CH4排放量顯著高于旋耕和免耕。

Three-field system 三區(qū)輪耕帶Extensive farming based on a 3-field crop rotation.

本帶的農(nóng)業(yè)集約度更低毛片网站在线免费播放，土地分三塊欧美日韩性爱AAA视频，分別種植燕麥、放牧和休耕国产东北老妓女视频在线播放，產(chǎn)品較輕国产东北老妓女视频在线，容易運輸。

Chapter 2 analyzes the traditional self-farming and farming-employed farming methods of the two main features; Chapter 3 is that about when the employer has been artificially cultivated after the elimination, only the self-farming; Chapter 4 is the traditional family smallholder farming production period on the way; Chapter 5 is a special historical period, the period of economic collectivization, In this paper, the period of collective farming as a total cultivated; Chapter 6 is still in accordance with the time and context with it. When the collective total cultivated end, after the family returned to farming, only this time, in family farming with the traditional small family farming periods vary. Chapter 7 is about modern machinery which widely practiced in another way when a new concept of farming and farming methods.

第二章主要分析的是傳統(tǒng)社會自耕和雇耕兩種耕作方式的主要特點91亚洲精品自在在线观看不卡的；第三章介紹的是當雇耕被人為的消滅之后91自拍偷拍免费视，只剩下自耕時的情況；第四章則是到了傳統(tǒng)的家庭小農(nóng)生產(chǎn)時期的耕作方式的介紹美女被草逼一级A片视频；第五章是一個特殊的歷史時期二区免费视频，即集體化的經(jīng)濟時期思思热国产精品视频，本文將這個時期的耕作方式稱之為集體共耕；第六章仍舊是依照時間脈絡(luò)順之而下www五月婷婷，當集體共耕結(jié)束后学生妹人人操人人干人人，重又回歸到家庭耕作的方式，只是這時候的家庭耕作又與傳統(tǒng)的小農(nóng)家庭耕作時期有所不同亚洲一区在线视频播放；到第七章則是現(xiàn)代化機器廣泛實行時的又一種全新的耕作理念和耕作方式黄色视频在线任意观看。

arable：耕啄

arabinose 阿糖 | arable 耕啄 | arable layer 耕足

arable：可耕的,適于耕種的 可耕的

aquiprata 水生草本群落,水草甸 水生草本群落 Y | arable 可耕的,適于耕種的 可耕的 Y | arable land 耕地 耕地 Y

arable layer：耕足

arable 耕啄 | arable layer 耕足 | arachic acid 花生酸

fallow time：休耕時間

fallow休耕 | fallow time休耕時間 | family planning家庭計劃;計劃生育

Returning farmland to forestland：退耕還林

退耕還林:Returning Farmland to Forest Land | 退耕還林:Returning farmland to forestland | 退耕還林還草:Returning farmland to forestland or grassland

hydroponic：水耕法的

hydropolymer 氫化聚合物 | hydroponic 水耕法的 | hydroponics 水耕法

plowing implement：犁耕機具

"plowing from center","外繞耕法" | "plowing implement","犁耕機具" | "plowing toward center","內(nèi)繞耕法"

soil tilth：土壤耕性,土壤適耕性

soil tiller 土翻拌機 | soil tilth 土壤耕性,土壤適耕性 | soil tone 土色

rotary tines and tine holders for power tillers：動力旋耕機旋耕齒和旋耕齒固定器

b7139 農(nóng)業(yè)用拖拉機犁鏵 share plow of agricult... | b7142 動力旋耕機旋耕齒和旋耕齒固定器 rotary tines and tine holders for power tillers | b7143 農(nóng)用拖拉機旋耕齒和旋耕齒固定器 rotary tine and rotary hol...

subsoiling：深松耕

淺耕 shallow plowing | 深松耕 subsoiling | 翻耕 plowing