【作者】 黄海琴； 陈海波； 陈凯； 余长洪； 胡均万； 李就好；

【Author】 Haiqin Huang1,2 Haibo Chen1 Kai Chen1 Changhong Yu1 Junwan Hu1 Jiuhao Li1 (1.South China Agricultural University,Guangzhou 510642 2.Luoding Polytechnic College,Luoding 527200)

【机构】 华南农业大学水利与土木工程学院； 广东省罗定职业技术学院；

【摘要】 为了缓解雷州半岛的季节性干旱对甘蔗生产的影响,在雷州半岛幸福农场节水试验基地,进行了深松覆盖、浅耕、免耕覆盖和深耕4种耕作措施对土壤含水率、温度及甘蔗苗期生长影响的比较试验。试验结果表明,在1米土层内,免耕覆盖提高土壤含水量,最高比浅耕提高22%,深耕和深松覆盖土壤含水量相差不大,在不同水文年这两种耕作措施各有优势,浅耕的土壤含水量最低;在0.7m土层内,免耕覆盖和深松覆盖土壤温度日变化平缓,与深耕和浅耕地温的日最大变幅最大可相差9.9℃,日平均气温相差都在0.8℃以上,最大相差1.7℃;免耕覆盖和深松覆盖降低了甘蔗出苗率,但分蘖率高于深耕和浅耕。更多还原

【Abstract】 In Leizhou Peninsula, the seasonal drought greatly restricted sugarcane productions. In order to alleviate the influence, the experiment was carried out on the Xingfu farm of Guangdong province, Leizhou Peninsula. There were four kinds of tillage methods (deep-loosening with mulch, non-tillage with mulch, shallow tillage and deep tillage), which affected on soil moisture content, soil temperature and sugarcane growth had been studied. The results can be summarized as follows: The soil moisture within depth of 0-100cm under non-tillage with mulch enhanced 22% more than that of shallow tillage. The soil moisture was no significant difference between deep tillage and deep-loosening with mulch. The soil moisture of shallow tillage was least among the four kinds of tillage methods. Within the depth of 0-70cm the soil temperature daily variation under protective cultivation methods (i.e. non-tillage with mulch and deep-loosening with mulch) were fewer and the daily average soil temperature decreased 0.8-1.7℃ comparing with that of traditional tillage methods (i.e. shallow tillage and deep tillage). The protective cultivation methods decreased the sugarcane germination ratio but increased the tillering ratio comparing with the traditional tillage methods.更多还原