Effect of Mulching on Rice Growth and Water Saving Potential in Saline-Sodic Soil

doi:10.3969/j.issn.1000-7091.2012.z1.022

Abstract

Abstract: A field experiment was conducted in order to investigate and understand the effects of mulching onrice growth and water saving potential in saline-sodic soil． The results showed that rice heading was promoted bymulching cultivation ( MC) ， and rice grains per ear， grain weight per one thousands， seed rate and harvest indexwere increased in MC treatment than those in CK． Because a wide and narrow row planting patterns was applied，plant density increased， as a result， rice tillering was inhibited， and rice yield was slightly lower than that in conventional cultivation ( CK) in saline-sodic soil． The growth characteristics of rice was not significant different betweenMC treatment and CK treatment， but EC and pH of soil were significantly reduced in MC compared with those inCK． For example， EC and pH of soil (0 － 10 cm) was decreased by 0． 35 － 0． 48 dS /m and 0． 3 units in MC treatment than those in CK in rice tillering stage， respectively． Compared with conventional cultivation ( CK) ， irrigationwater was reduced by 17% in MC treatment， and water productivity was increased． The loss of soil available nutrients was reduced in MC treatment than that in CK， and the soil fertility was increased． Therefore， we need to developpractices that can maximum the role of water saving and salt control with mulching， while considering planting density and nutrient supply for higher grain yield of rice in saline-sodic soil．

Key words: Saline-sodic soil, Rice, Mulching, Yields, Water consumption

CLC Number:

S511

HUANG Li-hua, LIANG Zheng-wei, WANG Ming-ming, GU Xiao-yan, WANG Zhi-chun, YANG Fu. Effect of Mulching on Rice Growth and Water Saving Potential in Saline-Sodic Soil[J]. ACTA AGRICULTURAE BOREALI-SINICA, doi: 10.3969/j.issn.1000-7091.2012.z1.022.

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