Water storage in a Plinthaqualf cultivated with sugarcane under straw levels

被引：0
|
作者：
Rocha dos Anjos, Joao Carlos [1 ]
de Andrade Junior, Aderson Soares [2 ]
Bastos, Edson Alves [2 ]
Noleto, Donavan Holanda [3 ]
Melo, Francisco de Brito [2 ]
de Brito, Raimundo Rodrigues [4 ]
机构：
[1] Univ Fed Piaui UFPI, Campus Prof Cinobelina Elvas, BR-64900000 Bom Jesus, PI, Brazil
[2] Embrapa Meio Norte, Ave Duque de Caxias 5-650, BR-64006220 Teresina, PI, Brazil
[3] Co Nacl Abastecimento, Superintendencia Reg Maranhao, Rua Sabias 04,Quadra 05,Lotes 04 & 05, BR-65075360 Sao Luis, MA, Brazil
[4] Univ Fed Piaui, Programa Posgrad Agron, Campus Univ Minist Petronio Portella S-N, BR-64049550 Teresina, PI, Brazil
来源：
PESQUISA AGROPECUARIA BRASILEIRA | 2017年 / 52卷 / 06期
关键词：
Saccharum officinarum; no-tillage; soil mulch; water balance; MOISTURE;
D O I：
10.1590/S0100-204X2017000600010
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
The objective of this work was to evaluate water storage in a Plinthaqualf under different straw levels during the fourth ratoon season of a sugarcane (Saccharum officinarum) crop. The study was conducted in the 2013/2014 crop season, with the cultivar SP-813250, at two soil depths (0.0-0.3 and 0.3-0.6 m), in a randomized complete block design, with five straw levels (0.0, 4.2, 9.5, 13.0, and 18.4 Mg ha(-1)) and four replicates. Soil moisture content was monitored with a time-domain reflectometer. The straw provided gains of up to 20 Mg ha(-1) stems and kept increased water storage in the soil, in comparison with the soil without straw, in all evaluated periods. Maintenance of up to 50% (9.5 Mg ha(-1)) of sugarcane straw on soil surface promotes better water retention in the soil per Mg of straw added and delays the reach of critical water storage in the soil by up to 11 days, when compared with soil without straw cover.
引用
收藏
页码：464 / 473
页数：10
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