安康煙區(qū)植煙土壤養(yǎng)分分類及施肥對(duì)策
Nutrient Classification of Tobacco Soils and Fertilization in Ankang
-
摘要: 以安康煙區(qū)74個(gè)村的植煙土壤養(yǎng)分為數(shù)據(jù)源,，運(yùn)用系統(tǒng)聚類分析法對(duì)植煙土壤進(jìn)行分類，并按照測(cè)土配方施肥方法計(jì)算各類植煙土壤的理論施肥量,。結(jié)果表明：（1）安康煙區(qū)植煙土壤可分為4類,，各類在有機(jī)質(zhì),、堿解氮、速效磷含量以及速效鉀含量上均有明顯差異,。（2）根據(jù)李志宏對(duì)我國植煙土壤養(yǎng)分狀況的評(píng)價(jià)標(biāo)準(zhǔn)，安康煙區(qū)的4類植煙土壤,，第①類4種土壤養(yǎng)分含量均低,；第②類土壤有機(jī)質(zhì)含量適宜,，堿解氮含量較高,，其他均低,；第③類土壤有機(jī)質(zhì)含量較低,，速效鉀含量較高，其他均低,；第④類4種土壤養(yǎng)分含量均較高,。根據(jù)各類土壤養(yǎng)分供給狀況,，計(jì)算了4類植煙土壤對(duì)4種肥料的理論需求量,。（3）從地理分布來看,，第①,、③類植煙土壤主要分布在旬陽縣和白河縣,，第②類主要分布在平利縣，第④類主要在旬陽縣和平利縣,。旬陽縣,、白河縣、石泉縣50％以上的植煙村莊屬于第③類,，平利縣58.33％的植煙村莊屬于第②類,。Abstract: Cluster analysis was employed to classify tobacco soils in Ankang basing on the soil nutrient data from 74 villages, and the fertilizer rates were calculated for each group of soil in term of formulated fertilization. The results showed that tobacco soils in 74 villages could be clustered into 4 groups with definite diversity in contents of organic matter, available nitrogen, available phosphorus and available potassium. According to the evaluation standard of Li zhihong on nutritional status of tobacco soil in China, the four kinds of soil nutrition contents in the first cluster were low, while in the second cluster, the contents of soil organic matter was suitable, and the available nitrogen was high, others were low. In the third cluster, the content of soil organic matter was lower, and the contents of available potassium was higher, others were low. In the fourth cluster, four kinds of nutrient were higher. According to nutritional status of tobacco soil in different clusters, the expected dose rate of tobacco soil in different clusters was calculated. From the perspective of geographic distribution, the first and the third cluster were mainly in Xunyang and Baihe, the second was mainly in Pingli, the fourth was mainly in Xunyang and Pingli. Over 50 percent of villages belonged to the third cluster in Xunyang, Baihe and Shiquan, 58.33 percent of villages belonged to the second cluster in Pingli county. Basing on the different fertility characteristics in four clusters of tobacco soils, fertilizing schemes were designed.
下載: