|Table of Contents|

Effects of fertilization and plastic film mulching on yield formation and soil carbon pool of dry land wheat*(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2019 06
Page:
1-12
Research Field:
Articles
Publishing date:

Info

Title:
Effects of fertilization and plastic film mulching on yield formation and soil carbon pool of dry land wheat*
Author(s):
LI Shun1 LI Tingliang1 2** FANG Ling3 HE Bing1 JIAO Huan1 & LI Yan1
1 College of Resources and Environment, Shanxi Agricultural University, Taigu 030801, China
2 National Demonstration Center for Agricultural Resources and Environment Experimental Teaching, Shanxi Agricultural University, Taigu 030801, China
3 Shanxi Institute of Scientific and Technical Information, Taiyuan 030001, China
Keywords:
dry land wheat fertilization film mulching yield formation soil carbon pool
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2019.01045
DocumentCode:

Abstract:
This study is aimed to overcome the problems of excessive fertilizer input and nutrient supply imbalance in dry land wheat production of the Loess Plateau, effects of monitoring and quantitative fertilization on wheat yield and soil carbon pool needed to be studied under typical mulching modes. Through the field experiment, the population dynamic variation, dry matter accumulation, yield formation and changes of soil organic carbon of dry land winter wheat were studied by four modes: farmer practice(FP), monitored fertilization(MF), ridge-furrow with plastic film mulching system(RF) and flat soil surface with plastic film mulching and hole sowing(FH) from 2012 to 2016. The results showed that FH treatment could significantly improve the population structure of wheat. Compared with FP treatment, the number of basic seedlings, maximum tillers and spike of FH treatment increased by 24.8%, 24.6% and 31.3%(P<0.05), respectively. The increase of dry matter accumulation is mainly reflected in the late growth stage, and the dry matter quality at maturity increased by an average of 43.3% compared with the farmer practice. The grain yield of different treatments was significantly positively correlated with the spike number and 1000-grain weight, with the correlation coefficients of 0.810** and 0.80**.The FH treatment had the highest number of spike and 1000-grain weight which was 36.7% and 4.8% higher than that of FP treatment, respectively, and the grain yield increased by 42.1%. Monitoring fertilization combined with mulching could significantly increase soil total organic carbon (TOC) content compared with FP treatment. RF treatment is more beneficial to the increase of light organic carbon (LFOC) in soil organic carbon active components, while FH treatment is more beneficial to the increase of recombinant organic carbon (HFOC) in soil organic carbon stability components. Compared with the MF treatment, the film-mulching planting significantly increased the content of particulate organic carbon (POC), but the difference of water-soluble organic carbon (SWOC) content in different treatments was not significant. In summary, the monitored fertilization combined flat soil surface with plastic film mulching and hole sowing can better construct the wheat population structure, increase the dry matter accumulation and grain yield, and increase the soil stable organic carbon and total organic carbon by increasing the amount of biological return, which is more suitable for high-yield and high-efficiency production and soil quality improvement of winter wheat in the dryland of the Loess Plateau.

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Last Update: 2019-04-12