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少耕比普耕整地质量好,平坦度高,可为水稻生育创造良好的耕层,能做到“上糊下松,有水有气”的农艺要求。在水稻生育期,免耕区土壤紧实度由硬变软,土壤容重由重变轻,其它与此相反。当土壤旱测紧实度11公斤/厘米。或水测容重1.3克/厘米。以上时,影响稻根伸长。实行旱少耕、免耕一年和二年与普耕相比,提高耕层土壤氧化还原电位,增加渗透水量,改善耕层土壤物理性质,促使水稻生育。但在冲积型水稻土、草甸型水稻土上,当连续免耕、旱少耕三年时,因渗透性过强,而不利水稻高产。
Less tillage than Pu cultivation The quality of land preparation is good and the flatness is high. It can create good tillage for rice growth and can fulfill the agronomic requirements of “getting loose, water and gas.” During the rice growth period, soil compaction in the no-till area changed from hard to soft, and soil bulk density changed from light to heavy. In contrast, When the soil drought measurement compaction 11 kg / cm. Or water to measure the weight of 1.3 g / cm. Above, the impact of rice root elongation. The implementation of dry and tillage, no-tillage a year and two years compared with the general farming, raise soil redox potential, increase the infiltration of water, improve the physical properties of tillage soil, and promote rice growth. However, in alluvial paddy soil and meadow-type paddy soil, when no-tillage, dry-tillage and continuous tillage for three years, the permeability is too strong and the yield of rice is unfavorable.