crop growth rate 中文意思是什麼
crop growth rate
解釋
作物生長率-
Analysis of net assimilation rate and crop growth rate indicates that two peaks of photosynthetic activity occur during the growing season.
凈同化率和作物生長率分析表明，在生長季節出現兩個光合活性高峰。 -
For crop plants, hybrids vigor is particularly important for characteristics such as growth rate, yield, and disease resistance
對于農作物而言，雜種優勢在生長速度，產量和抗病能力等方面表現出更顯著的優越性。 -
The seed dipping and foliage test on some vegetable with liquid seaweed manure prepared by acid - degradation and enzyme degradation showed that the liquid seaweed manure could enhance seed germination rate, promote crop growth, increase production and improve quality
摘要採用由酶解法和酸解法制得的海藻液體肥，在蔬菜作物上進行浸種和葉面噴灑試驗，結果表明：海藻液體肥能顯著提高種子發芽率，促進作物的生長發育，提高作物產量，改善作物品質。 -
They are agricultural productive materials price growth rate, sown area of grain crops growth rate, grain yield per area growth rate -, natural disaster covered grain areas growth rate, net grain import change rate, grain reserve change rate, population growth rate, per income growth rate, city and town population growth rate, food industry production value growth rate, year - end pig number growth rate, medical & pharmaceutical and textile industry production value growth rate, grain marketization degree, inflation rate using the previous year as base year ( preceding year = 100 ), public grain purchases price growth rate, investment in agricultural science and technology growth rate, investment in agricultural infrastructure growth rate, growth rate of graduates number from agriculture, forestry, science & technology universities and colleges and specialized secondary schools, government expenditure for agriculture and agricultural credit growth rate, international grain price growth rate, rmb exchange rate growth rate, last grain price growth rate, economic crop price growth rate, meanwhile, a new method is attempted to be used in this paper and the grain price early - warning problem is transformed into machine learning problem by introducing statistic learning theory and svm method which are gaining popularity in machine learning field at present in the world
在此基礎上，篩選出23個警兆指標：農用生產資料價格增長率、糧食播種面積增長率、糧食單產增長率、糧食受災面積增長率、糧食凈進口量變化率、糧食儲備變動率、人口增長率、人均收入增長率、城鎮人口增長率、食品工業產值增長率、豬年末頭數增長率、醫藥紡織工業產值增長率、糧食市場化程度、以上年為基年的通貨膨脹率、國家糧食定購價格增長率、農業科技投入增長率、農業基礎設施投入增長率、農、林、科技高校大、中專畢業生人數增長率、財政支農資金比重及農業信貸增長率、國際糧食市場價格增長率、人民幣匯率增長率、上期糧食價格增長率、經濟作物價格增長率。同時論文在預警方法上作了新的嘗試，把糧食價格預警問題轉換成一個機器學習問題，引進當前國際上機器學習領域中比較熱門的統計學習理論和支持向量機方法，用順序回歸演算法對歷史數據進行學習建立了糧食價格預警模型。
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