Responses of Greenhouse Tomato and Pepper Yields and Nitrogen Dynamics to Applied Compound FertilizersEnglish Full Text
ZHU Jian-Hua, LI Xiao-Lin, ZHANG Fu-Suo, LI Jun-Liang and P. CHRISTIE Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100094 (China). E-mail: zhucool@caf.ac.cn Department of Agronomy, Laiyang Agricultural College, Shandong 265200 (China) Agricultural and Environmental Science Department, Queen’s University Belfast, Newforge Lan? Belfast BT9 5PX (UK) Present address: Institute of Forest Ecology, Environment & Protection, Chinese Academy of Forestry, Beijing 100091, China.
Abstract: Yield and N uptake of tomato (Lycopersicum esculentum Mill.) and pepper (Capsicum annuum L.) crops in five successive rotations receiving two compound fertilizers (12-12-17 and 21-8-11 N-P2O5-K2O) were studied to determine 1) crop responses, 2) dynamics of NO3-N and NH4-N in different soil layers, 3) N balance and 4) system-level N efficiencies. Five treatments (2 fertilizers, 2 fertilizer rates and a control), each with three replicates, were arranged in the study. The higher N fertilizer rate, 300 kg N ha-1 (versus 150 kg N ha-1), returned higher vegetable fruit yields and total aboveground N uptake with the largest crop responses occurring for the low-N fertilizer (12-12-17) applied at 300 kg N ha-1 rather than with the high-N fertilizer (21-8-11). Ammonium-N in the top 90 cm of the soil profile declined during the experiment, while nitrate-N remained at a similar level throughout the experiment with the lower rate of fertilizer N. At the higher rate of N fertilizer there was a continuous NO3-N accumulation of over 800 kg N ha-1. About 200 kg N ha-1 was applied with irrigation to each crop using NO3-contaminated groundwater. In general, about 50% of the total N input was recovered from all treatments. Pepper, relative to tomato, used N more efficiently with smaller N losses, but the crops utilized less than 29% of the fertilizer N over the two and a half-year period. Local agricultural practices maintained high residual soil nutrient status. Thus, optimization of irrigation is required to minimize nitrate leaching and maximize crop N recovery.
- Series:
(D) Agriculture
- Subject:
Fundamental Science of Agriculture; Agronomy
- Classification Code:
S147
- Mobile Reading
Read on your phone instantly
Step 1Scan QR Codes
"Mobile CNKI-CNKI Express" App
Step 2Open“CNKI Express”
and click the scan icon in the upper left corner of the homepage.
Step 3Scan QR Codes
Read this article on your phone.
- HTML
- CAJ Download
- PDF Download
Download the mobile appuse the app to scan this coderead the article.
Tips: Please download CAJViewer to view CAJ format full text.
Download: 76 Page: 213-222 Pagecount: 10 Size: 472k
Citation Network
Related Literature
- Similar Article
- Reader Recommendation
- Associated Author