crop n. 1.農(nóng)作物,莊稼;收獲;收成;〔the crops〕 一季的收獲量,產(chǎn)量。 2.(同一時期出現(xiàn)的人物等)一批,一群,大量。 3.剪短;短發(fā)。 4.獵鞭;鞭柄。 5.〔鳥〕嗉囊。 6.(家畜的)耳印。 7.(樹等的)頂,梢,尖兒;【建筑】葉尖;【礦物】露頭。 an abundant [a bumper] crop豐收。 a bad [poor] crop歉收。 a rice crop水稻作物。 industrial crops 經(jīng)濟作物。 row crops 中耕作物。 standing [growing] crops 植株,青苗。 a catch crop填閑作物。 the black crop豆類作物。 the green crop菜類作物;牧草類作物。 the white crop谷類作物。 this year's crop of students 今年畢業(yè)的一批學(xué)生。 a crop of troubles 麻煩一大堆。 a close crop剪短發(fā)。 a crop of (disputes questions) 一大批(爭論、問題)。 a crop of pimples 一大批粉刺[疙瘩]。 crop and root 全部。 crop capacity 谷物單位面積產(chǎn)量。 crop rotation 輪作(法),輪種。 crop succession 輪作順序。 crop tree 林木。 crop yield 茬地作物的產(chǎn)量。 in [under] crop 種著作物,在耕種。 out of crop 未種作物,未耕種。 the crop-mowing season 收割季節(jié)。 vt. [cropped, cropt] 1. 修剪,剪(樹枝,頭發(fā)等);割去(動物耳朵的)一角(作標記),剪掉(書上的)多余白邊;(馬)啃去(草尖等)。 2. 收割,收獲。 3. 種植,栽培,播種。 vi. 1.生產(chǎn);發(fā)生,發(fā)芽。 2.(性質(zhì)等)突然出現(xiàn),(問題等)突然發(fā)生,(礦床等)露出 (out forth up)。 3.(羊、鳥等)吃去嫩芽。 All sorts of unexpected difficulties cropped up. 種種想像不到的困難都發(fā)生了。 cropping system 耕作制度。
multiple adj. 1.多重的;復(fù)合的,復(fù)式的,多數(shù)的,多樣的。 2.倍數(shù)的,倍。 3.【電學(xué)】并聯(lián)的;多路的,復(fù)接的。 4.【植物;植物學(xué)】聚花的。 a man of multiple interests 興趣廣博的人。 n. 1.【數(shù)學(xué)】倍數(shù)。 2.【電學(xué)】并聯(lián);多路系統(tǒng)。 3.相聯(lián)成組。 4.成批生產(chǎn)的藝術(shù)品〔畫、雕塑、工藝品等〕。 common multiple 公倍數(shù)。 least common multiple 最小公倍數(shù)。
Study on productivity and efficiency of six different multiple cropping systems 不同復(fù)種方式的生產(chǎn)力和效益研究
Wheat-maize interplanting of both crops'high yield features shorter cycling period, higher multiple cropping index, stronger fertility exhaustion and no time for soil fertility to recover 小麥-玉米套種兩作產(chǎn)量皆高是以周期短、復(fù)種指數(shù)高、肥力耗竭強為特征,土壤肥力沒有時間得以復(fù)原。
In order to increase the fanner's economic benefit and sufficient use resource of field and sunlight in xinhe county of aksu area, the experiment was carried out on multiple cropping the processing tomato in intercropping system of fruit trees and winter wheat after harvest 摘要為了充分利用地力,光熱資源和提高復(fù)播指數(shù),增加種植農(nóng)戶的經(jīng)濟效益,在阿克蘇地區(qū)新和縣進行了果樹行間冬麥收獲后,復(fù)播加工番茄的試驗,獲得成功。
The results indicate that ( 1 ) land production is on the basic development level, the restrictive factors of land production are the ratio of land production, product of crop, the area of medium and low production, multiple crop index 研究結(jié)果表明:土地生產(chǎn)力處于基本可持續(xù)發(fā)展階段。土地生產(chǎn)率、公頃糧食產(chǎn)量、中低產(chǎn)田的面積、復(fù)種指數(shù)等對土地生產(chǎn)力的持續(xù)發(fā)展起限制作用;資源環(huán)境保護從初步可持續(xù)發(fā)展到基本可持續(xù)階段。
Other factors that were found to have positive effects on soil nutrients include the multiple cropping index and the practice of plowing stalks back into the land . these findings lead to several policy recommendations . first, it shows that economic variables are very important in determining changes in soil fertility, and therefore the theory and method of economics should be taken seriously by soil scientists 然后,根據(jù)理論預(yù)期以及單因素分析結(jié)果,我們建立了土壤肥力變化的社會經(jīng)濟及政策影響因素模型,分別采取差分和固定效應(yīng)兩種具體模型形式,對各種可能的社會經(jīng)濟及政策因素對土壤肥力變化影響的方向和程度做了定量估計。
The no-tillage and culture focus more on creating better conditions for microbe decomposing the crop residue compared with no-tillage . there are four principle in it : 1 ) successive capillary water circulation; 2 ) successive no-tillage; 3 ) successive multiple crop rotation; and 4 ) successive " ridge and furrow culture " . by these devices taken, the soil accumulate more organic matter in shorter period compared with general no-tillage 將秸稈混入土壤中分解,壟、溝搭配,保持土壤的浸潤狀態(tài)和連續(xù)植被,不僅解決了覆蓋免耕制中有機質(zhì)分解、轉(zhuǎn)化慢的問題,而且使輸入土壤的有機質(zhì)分解、轉(zhuǎn)化更加迅速,所以在促進土壤有機質(zhì)循環(huán)方面自然免耕制表現(xiàn)出明顯的優(yōu)越性,土壤有機質(zhì)遂表現(xiàn)為快速的增長。
Based on the cultivated land fertility, according to grain yield, the planting coverage, the ratio of the grain crops to industrial crops and multiple crop index, the cultivated land population carrying capacity in 2010 and 2030 at the different population increasing modes were attained by predicting and analysing the food produce and the cultivated land carrying capacity 摘要以耕地地力為基礎(chǔ),根據(jù)糧食單產(chǎn)、種植面積、糧經(jīng)比和復(fù)種指數(shù)對河南省糧食產(chǎn)量和耕地資源承載力進行了預(yù)測和分析,得出不同人口增長模式下的河南省2010年和2030年耕地資源人口承載力。