農(nóng)業(yè)專業(yè)英語知識-資料下載頁
2025-04-06 12:17本頁面
【正文】 e production of tip grades likely begins with better separation of upperstalk tobacco, ., separation of the top four to six leaves into one grade. However, separation of the uppermost leaves during harvest may not be enough to produce cured tobacco with the desired chemical and physical characteristics attributed to a tip grade.因此，生產(chǎn)頂葉等級可能是從上部葉的較好的分次采收開始的，即把最上部的46片葉分在一個等級。但是僅靠將最上部葉片分開采收，還不足以生產(chǎn)出具有頂葉等級的理想的化學(xué)和物理特性的煙葉。Research was conducted from 2002 through 2004 to evaluate the effects of variety, nitrogen rate, topping height, and separation of the upperstalk tobacco at harvest on production of tip grades. The study included K 326, NC 71, and Speight 168 varieties and pared remended nitrogen rates to the remended rate plus 20 pounds of N and hightopping to normaltopping heights. 為了評估品種、氮用量、打頂高度和上部葉分次采收對生產(chǎn)頂葉等級的影響，從20022004年進(jìn)行了研究。研究包括K32NC71和speight 168品種，對推薦氮用量和在推薦氮用量基礎(chǔ)上加20磅N以及高打頂和正常高度打頂進(jìn)行了比較。In addition, the uppermost 10 to 12 leaves were harvested together or divided equally into two harvests. Based on tobacco pany evaluations of upperstalk tobacco from these trials, ripeness and separation of the uppermost leaves had the greatest effect on tip grade production. 此外，還對最上部1012片葉一起采收和均分進(jìn)行兩次采收進(jìn)行了比較。根據(jù)煙草公司對來自從這些試驗的上部煙葉的評估，成熟度和最上部葉的分次采收對頂葉等級的牛產(chǎn)影響最大。When the top five to six leaves were kept separate from the rest of the plant and when they were ripe to overripe, they consistently received a tip grade. The nitrogen rate reduced tip grade production only when the high nitrogen rate resulted in greenish or green color grades. Variety had no influence on tip production at any location. 當(dāng)最上部56片口十與煙株上的其它葉片分開采收而且達(dá)到成熟或過熟時，它們總是進(jìn)入頂葉等級。只有在高氮用量導(dǎo)致帶青煙或青煙等級時，氮用量才減少頂葉等級的生產(chǎn)。品種在每個試驗地點都對頂葉等級的生產(chǎn)沒有影響。Additional research was conducted to evaluate removing either the bottom four or eight leaves as a way to reduce production of priming grades (Table 83). Preliminary data from this study indicates that removal of the bottom four leaves eliminates priming grades and the removal of the bottom eight leaves eliminates priming and lug grades. 為了評估除去底部4或8片葉以減少腳葉等級的方法，進(jìn)行了另外的研究(表83)。該研究的初步數(shù)據(jù)表明，去除底部4片葉消除腳葉等級，去除底部8片葉消除腳葉和下部葉等級。Removal of four leaves resulted in a 6 percent average reduction in yield and gross value per acre. Removing eight leaves resulted in a 20 percent average reduction in yield and gross value per acre. However, reduced curing and labor costs due to leaf removal would make the reduction in net value per acre less than the reduction in gross value.去除4片葉導(dǎo)致每英畝產(chǎn)量和毛產(chǎn)值下降6％，去除8片腎卜導(dǎo)致每英畝產(chǎn)量和毛產(chǎn)值下降20％。然而，由于去除葉片導(dǎo)致的調(diào)制和勞動力成本的降低，將使每英畝凈產(chǎn)值的減少小于毛產(chǎn)值的減少。
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