任正伟 1胡明勇 1罗冬生 1王志明 1王伟 1彭晓梦 1易展平 1王少希1
作者信息
- 1. 长沙市农业技术推广中心,湖南 长沙 410006
- 折叠
摘要
Abstract
Taking the 2024 Changsha City grain production"four high"experimental demonstration area as the research object,206 soil sam-ples were collected from paddy fields in five"four high"expansion areas,namely,Changsha County,Wangcheng District,Liuyang City,Ningx-iang City and Xiangjiang New District,and soil pH,organic matter,total nitrogen,total phosphorus,total potassium,alkaline hydrolyzable nitro-gen,available phosphorus and available potassium contents were determined.The results show that the coefficient of variation of soil pH in rice fields in the five"four high"expansion areas was less than 15%,which was mild variation,while the coefficient of variation of available phos-phorus and available potassium in Changsha County,Wangcheng District,Liuyang City and Ningxiang City was higher than 35%,which was a high degree of variation.The average soil pH of the five"four high"expansion areas was 5.60-5.77(weakly acidic),with Grade 2(relatively high)and Grade 3(medium)as the main values;soil organic matter and total nitrogen content were rich,with Grade 1(high)and Grade 2(relatively high)as the main values.The total phosphorus and available phosphorus contents of the soils in Wangcheng District and Xiangjiang New District were low,while the total potassium and available potassium contents of Wangcheng District,Liuyang City,Ningxiang City and Xiangjiang New District were low,with Grade 3(medium),Grade 4(relatively low)and Grade 5(low)predominating.In general,the soil pH in the"four high"experimental demonstration area for grain production in Changsha City in 2024 was suitable,and it was necessary to prevent soil acidification in Changsha County,but there were differences in the soil organic matter,phosphorus and potassium contents in the five expan-sion areas with"four high".It was recommended to cultivate organic fertilizer in Changsha County,Wangcheng District and Xiangjiang New District in actual production,and steadily increased the soil phosphorus content of Wangcheng District and Xiangjiang New District and the soil potassium content of Wangcheng District,Liuyang City,Ningxiang City and Xiangjiang New District,thereby improving the soil fertility level.关键词
土壤肥力/"四高"扩面区/稻田/长沙市Key words
Soil fertility/"Four high"expansion area/Rice field/Changsha City分类
农业科技
