Water-retaining agent has super-absorbent and water-retaining ability, and it has repeated water absorption function. After water absorption, it swells into a hydrogel, which can slowly release water for crop absorption and utilization, thereby enhancing soil water retention, improving soil structure, reducing moisture leakage, and increasing water content. Utilization rate. A multi-point soil temperature and humidity recorder was used to study the effects of different water-holding rates on soil temperature and humidity changes and growth in lemons. The purpose was to explore suitable water-retention measures for sustainable development of the lemon industry in the region, and to provide for high-quality, high-yield cultivation of lemons and lemon flowering control. Theoretical basis.
The treated water retaining agent was uniformly applied to the lemon drip line with a groove depth of 20 cm. From December 3, 2007 to June 2008, soil temperature and humidity recorders were used to measure the soil temperature and soil moisture at the depths of 20 cm and 30 cm in the rhizosphere of the canopy drip line at the top, middle, and late months of each month. Body growth status and flower condition. Test data were analyzed for variance using SPSS 11.0 statistical software.
From the effect of different soil moisture and temperature recorders on the soil temperature at different depths, the soil temperature at a depth of 20cm showed a slowly rising trend, which decreased on February 3, 2008, and then showed a rising trend. There was no significant difference in soil temperature between treatments during the same period. Soil temperature at a depth of 30 cm decreased from January 22, 2008 to the lowest value on February 3, showing the same decreasing trend as soil temperature at a depth of 20 cm, and then the soil temperature slowly increased again. There is little difference in soil temperature changes.
The soil moisture applied by the water retaining agent after treatment in the dry season was higher than the control (CK) test, showing different significant differences. From December to early January, the soil moisture content of each treatment showed a slowly rising trend and was relatively stable. From the beginning of February to the beginning of March, the soil humidity recorded by the multi-point soil temperature and humidity recorder decreased sharply. This is a period of drought in the garden, and the application of the water retaining agent has obvious performance.
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