- 復(fù)種指數(shù)
下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯
multiple crop index中文什么意思
例句與用法
- 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(qiáng)為特征，土壤肥力沒有時(shí)間得以復(fù)原。 - 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(hù)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(jì)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(jì)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(jì)。 - 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(jìn)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。