摘要
在我国典型茶区浙江杭州市西湖区、浙江新昌和福建安溪茶园调查 1998～ 1999年的养分投入状况 ,表明氮、磷、钾养分的平均总投入量 (N +P2 O5+K2 O)分别为 737.7、712 .0和694 .0 kg/ hm2 ,产值水平高的茶园施肥量也较高 ,主要表现为磷、钾肥的用量明显增加。养分表观平衡计算表明 ,各类茶园氮相对赢余 ,在新昌 35 .3%的茶园磷素处于亏缺状态 ,而在杭州这一比例为 60 .1% ;钾亏缺的比例在上述二地分别高达 67.2 %和 74 .8% ,年平均分别亏缺 12 .9和 2 2 .2 kg/ hm2 。土壤分析表明浙江杭州、新昌和福建安溪缺钾的土样比例分别为 95 %、63%和75 %。表明上述地区的一些茶园偏施氮肥现象比较普遍 ,磷、钾的投入相对不足 。
The input of nutrients to tea fields was investigated in Hangzhou and Xinchang of Zhejiang Province (Green tea) and Anxi of Fujian Province (Wulong tea) during 1998~1999. The average input (N+P 2O 5+K 2O) in these areas were 737.7?712.0 and 694.0 kg/hm 2, respectively. The input of nutrient generally increased and those of P and in particular K were remarkably higher in tea gardens of high product values. The apparent balances of K in 67.2% of the investigated fields in Xinchang and 74.8% in Hangzhou were negative with the deficit values of 12.9 and 22.2 K 2O kg/hm 2, respectively. The phosphorus balance in 35.3% of the investigated fields in Xinchang and 60.1% in Hangzhou was also minus whereas N inputs were generally in surplus. Soil analysis indicated that the exchangeable K from 63%~95% of the fields was under deficient level (80 mg/kg).
出处
《土壤肥料》
CSCD
北大核心
2001年第5期9-13,共5页
Soils and Fertilizers
基金
国际钾肥研究所 (IPI)支助
浙江省"15 1人才基金"支助
关键词
养分平衡
施肥
茶园
肥效
apparent balance
fertilization
tea
