摘要
2018年5月至10月在山东省日照市开展田间试验,研究滴灌条件下不同施氮(纯N)水平(0 kg/hm^2,N0;45 kg/hm^2,N1;75 kg/hm^2,N2;105 kg/hm^2,N3)和施钾(K2O)水平(0 kg/hm^2,K0;27 kg/hm^2,K1;54 kg/hm^2,K2;81 kg/hm^2,K3)对秋季茶叶产量及品质的影响。结果表明:在不同氮水平的对比中,施氮量为75 kg/hm^2(N2K2)时取得最高鲜叶产量及茶多酚、儿茶素、水浸出物含量;施氮量105 kg/hm^2(N3K2)时氨基酸、咖啡碱含量高于其他处理,且酚氨比最小。在不同钾水平的对比中,施钾量81 kg/hm^2(N2K3)时取得最高鲜叶产量且叶绿素、咖啡碱含量最高;施钾量54 kg/hm^2(N2K2)时氨基酸、茶多酚、儿茶素、水浸出物含量最高;施钾量为27 kg/hm^2(N2K1)时酚氨比最小。综合分析所有施肥处理的产量与品质,施氮量105 kg/hm^2、施钾量54 kg/hm^2(N3K2)时表现最优。
China is a country with the highest tea production and planting area in the world, but the average yield per unit area is low and the production scale of high-quality tea develops very slowly. Unreasonable fertilization is one of the key factors restricting the improvement of yield and quality of tea. Field experiment was conducted to study the effect of different nitrogen(pure N) fertilization levels(0 kg/hm^2, N0;45 kg/hm^2, N1;75 kg/hm^2, N2;105 kg/hm^2, N3) and potassium(K2 O) fertilization levels(0 kg/hm^2, K0;27 kg/hm^2, K1;54 kg/hm^2, K2;81 kg/hm^2, K3) on autumn tea yield and quality under drip irrigation in Rizhao, Shandong Province from May to October in 2018. The results showed that the yield of autumn tea increased with the increase of nitrogen fertilization in the range of 0-75 kg/hm^2, then reached the maximum value in the range of 75-105 kg/hm^2(N3 K2 and N2K2). Nitrogen fertilization could significantly increase the content of chlorophyll a and total chlorophyll but had no significant effect on chlorophyll b, the chlorophyll content was the highest at a nitrogen fertilization rate of 105 kg/hm^2(N3 K2). The content of amino acid, caffeine and water extract of each nitrogen treatment increased with the increase of nitrogen fertilization rate, and the maximum value was obtained at the nitrogen fertilization rate of 105 kg/hm^2(N3 K2). The ratio of phenol to amino acid was applied to nitrogen reached a minimum value of 10.97 at the nitrogen fertilization of 105 kg/hm^2(N3 K2) which was significantly lower than other treatments. The maximum content of tea polyphenols was obtained at the nitrogen fertilization amount of 75 kg/hm^2(N2K2). The yield of autumn tea increased with the increase of potassium fertilization and reached the maximum yield of 1 711.37 kg/hm^2(N2K3) when the potassium fertilization amount was 81 kg/hm^2, which was 23.58% higher than that the treatment without potassium fertilization. All the treatments with potassium fertilization had a significantly higher yield of autumn tea than
作者
庞永磊
王凤新
黄泽军
李斌
胡芳东
夏英三
Pang Yonglei;Wang Fengxin;Huang Zejun;Li Bin;Hu Fangdong;Xia Yingsan(Center for Agricultural Water Research in China,China Agricultural University,Beijing 100083,China;Rizhao Lanshan District Bureau of Agriculture and Rural Affairs,Rizhao 276800,China;Shandong Wanping Agriculture Development Co.,Ltd,Rizhao 276800,China;Shandong Xingshui Water Resources Technology Industry Co.,Ltd,Jinan 250000,China.)
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2019年第24期98-103,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
水利部公益性行业科研专项基金项目(201501017)
关键词
滴灌
秋茶
氮肥
钾肥
产量
品质
drip irrigation
autumn tea
nitrogen fertilization
potassium fertilization
yield
quality
