4438最大成人|麻豆传媒国产AV手机在线播放|泉州市麻豆文化传媒公司|麻豆传媒md0076沈芯语在线|m麻豆传媒映画微博|yy4080香蕉视频|91制片厂制作厂|国产网红主播精品一区二区|sd肉蒲团|国产成人高清亚洲一区潘金莲,爱豆传媒网站视频资源,兔子先生第一,swag在哪看

    高級(jí)檢索

    鄂西南植煙土壤養(yǎng)分狀況分析

    Analysis on Soil Nutrients of Tobacco-growing Areas in Southwest Hubei

    • 摘要: 對(duì)鄂西南8個(gè)產(chǎn)煙縣（市）進(jìn)行了土壤取樣調(diào)查分析。結(jié)果表明,，鄂西南煙區(qū)14％的土壤存在酸化趨勢(shì),；約50%土壤的有機(jī)質(zhì)和86.5％土壤的堿解氮含量偏高；28％的土壤非常缺磷,，63.5％的土壤缺鈣,；58.5％的土壤缺鉀,，其中20.1％的極度缺鉀；89％的土壤缺鎂,；88.2％的土壤缺硼,，其中54.4％的嚴(yán)重缺硼。因此,，應(yīng)采取相應(yīng)措施調(diào)節(jié)酸堿度,，嚴(yán)格控制氮肥用量，重視普鈣（過磷酸鈣）,、鉀肥,、鎂肥和硼肥的施用。該煙區(qū)79.1％的土壤不缺鋅,，因此,，缺鋅不是該煙區(qū)煙葉生產(chǎn)的主要障礙，但需要關(guān)注土壤有效鋅含量的變化趨勢(shì),。

       

      Abstract: Soil samples from eight tobacco production areas in southwestern Hubei Province were analyzed. The results indicated that 14% of the soil experienced different levels of acidification. 50% and 86.5% of the soils were found with relatively higher levels of organic matter and available nitrogen, respectively. 63.5%, 58.5%, 89% and 88.2% of the soils were deficient in calcium, potassium, magnesium, and boron, respectively, including 28%, 20.1%, and 55.4% of the soils extremely poor in phosphorus, potassium, and boron, respectively. Thus measures should be taken to control soil pH and nitrogen fertilizer rate, and calcium, potassium, magnesium and boron fertilizer should be applied. 79.1% of the soils were not deficient in zinc, but we should pay attention to changes of soil zinc contents

       

      • HTML全文

    /

    返回文章
    返回