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黑龍江水稻機插秧同步側深施肥技術階段試驗
2019-05-07
09:19:19
來源:黑龍江省農機化技術推廣總站? 閱讀量:12947
評論
【農機網 地方農機】水稻側深施肥技術是農業農村部2018年發布的十項重大性農業技術之一。為了探索適合黑龍江省的水稻機插秧同步側深施肥技術模式,減少水稻化肥使用量,提高水稻生產效益,2018年,黑龍江省農機化技術推廣總站選擇方正縣、樺南縣、綏濱縣、建三江創業農場等4個基礎較好的縣(場),開展了該技術的階段性試驗。試驗結果表明,在比較肥沃的老稻田季使用該技術,減少化肥使用量10%的情況下,4個試驗點的水稻都有一定的增產。
一、試驗背景
水稻側深施肥技術是通過
插秧機加裝施肥裝置,在機插秧作業的同時,一次性完成開溝、施肥、覆土等作業,把肥料施在秧苗側部一定深度土壤中的機械化生產技術。一般施肥深度為4~5cm,多選用緩控復合肥,以平衡水稻全生長期的養分供應。傳統水稻機插秧施肥方法是在水稻種植前將肥料人工撒施在水面上、或是整地時將肥料均勻攪拌于土壤中。與傳統方法相比,水稻側深施肥技術具有顯著提高肥料利用率、促進水稻前期營養生長、降低成本、減輕勞動強度等優勢。
二、試驗設計
根據黑龍江省部分地區的水稻機插秧側深施肥資料,省推廣總站設計了當地傳統施肥量和傳統施肥方式(CK),以及在當地傳統施肥量基礎上減少化肥用量10%(T1)、20%(T2)、30%(T2)三種采用側深施肥技術的試驗方案。其他的各項管理措施保持一致。
四個試驗點的稻田均為多年種植水稻的老稻田,當地農民反映土壤肥力中等偏上。
根據當地習慣,四個試驗點選用的化肥分別是中化美農緩控復合肥(氮磷鉀比例21-15-16)、中化萬福農緩控復合肥(氮磷鉀比例21-15-16)、中農欣欣生物肥(氮磷鉀比例14-12-14)、倍豐復合肥(氮磷鉀比例25-15-17)。
根據當地情況,使用的帶有側深施肥裝置的水稻插秧機主要有洋馬、久保田、大同和井關一體插秧機,配套的側深施肥裝置由龍舟、永祥和牡丹江研究所等單位研制生產,施肥位置為水稻秧苗側部5cm,施肥深度5cm。
三、產量表現
各試驗點各處理的稻谷產量如下表所示。可以看出,在中上等肥力的老稻田上使用機插秧側深施肥技術,即使減少30%的化肥用量,試驗沒有出現普遍的明顯減產;減少化肥用量10%,都有比較明顯的增產。
當然,由于化肥存在后效,這個結論可能只適用于季采用側深施肥技術的老稻田。是否可以長期減少化肥用量的10%或更高,還需要更長期的定位試驗來驗證。
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